23157312 has 56 divisors (see below), whose sum is σ = 63398400. Its totient is φ = 7451136.

The previous prime is 23157311. The next prime is 23157313. The reversal of 23157312 is 21375132.

It is an interprime number because it is at equal distance from previous prime (23157311) and next prime (23157313).

It is a super-2 number, since 2×23157312² = 1072522198130688, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (23157311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3489 + ... + 7647.

Almost surely, 2^23157312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23157312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31699200).

23157312 is an abundant number, since it is smaller than the sum of its proper divisors (40241088).

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

23157312 is a wasteful number, since it uses less digits than its factorization.

23157312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4203 (or 4193 counting only the distinct ones).

The product of its digits is 1260, while the sum is 24.

The square root of 23157312 is about 4812.2044844333. The cubic root of 23157312 is about 285.0335940701.

The spelling of 23157312 in words is "twenty-three million, one hundred fifty-seven thousand, three hundred twelve".