katarithmeo describes being counted as part of a group, as a person included among those receiving a ministry share.

The attested use describes a person being counted within a group: in Acts 1:17, the clause also places that person in receipt of a share in ministry.

1. Counted within a group · dominant

   In Acts 1:17, κατηριθμημένος is a perfect passive participle, nominative singular masculine, describing a person as counted among a group. The APB renders the clause as that person's inclusion in the group and receipt of a share in ministry.

   Acts 1:17

In the Anselm Project Bible: In Acts 1:17, the APB presents the clause as inclusion in a group together with receipt of a share in ministry.