23156157 has 4 divisors (see below), whose sum is σ = 30874880. Its totient is φ = 15437436.

The previous prime is 23156141. The next prime is 23156173. The reversal of 23156157 is 75165132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (23156141) and next prime (23156173).

It is not a de Polignac number, because 23156157 - 2⁴ = 23156141 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 (23156957) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3859357 + ... + 3859362.

It is an arithmetic number, because the mean of its divisors is an integer number (7718720).

Almost surely, 2^23156157 is an apocalyptic number.

It is an amenable number.

23156157 is a deficient number, since it is larger than the sum of its proper divisors (7718723).

23156157 is an equidigital number, since it uses as much as digits as its factorization.

23156157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7718722.

The product of its digits is 6300, while the sum is 30.

The square root of 23156157 is about 4812.0844755677. The cubic root of 23156157 is about 285.0288551886.

The spelling of 23156157 in words is "twenty-three million, one hundred fifty-six thousand, one hundred fifty-seven".