23128157 has 12 divisors (see below), whose sum is σ = 25297920. Its totient is φ = 21133008.

The previous prime is 23128129. The next prime is 23128159. The reversal of 23128157 is 75182132.

It is not a de Polignac number, because 23128157 - 2¹⁴ = 23111773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23128159) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17444 + ... + 18722.

It is an arithmetic number, because the mean of its divisors is an integer number (2108160).

Almost surely, 2^23128157 is an apocalyptic number.

It is an amenable number.

23128157 is a deficient number, since it is larger than the sum of its proper divisors (2169763).

23128157 is a wasteful number, since it uses less digits than its factorization.

23128157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1412 (or 1399 counting only the distinct ones).

The product of its digits is 3360, while the sum is 29.

The square root of 23128157 is about 4809.1742534452. The cubic root of 23128157 is about 284.9139249657.

The spelling of 23128157 in words is "twenty-three million, one hundred twenty-eight thousand, one hundred fifty-seven".