23139512 has 16 divisors (see below), whose sum is σ = 47331000. Its totient is φ = 10517920.

The previous prime is 23139497. The next prime is 23139553. The reversal of 23139512 is 21593132.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131387 + ... + 131562.

Almost surely, 2^23139512 is an apocalyptic number.

23139512 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

23139512 is an abundant number, since it is smaller than the sum of its proper divisors (24191488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23139512 is a wasteful number, since it uses less digits than its factorization.

23139512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262966 (or 262962 counting only the distinct ones).

The product of its digits is 1620, while the sum is 26.

The square root of 23139512 is about 4810.3546646791. The cubic root of 23139512 is about 284.9605444508.

The spelling of 23139512 in words is "twenty-three million, one hundred thirty-nine thousand, five hundred twelve".