23157232 has 40 divisors (see below), whose sum is σ = 51584000. Its totient is φ = 9865152.

The previous prime is 23157223. The next prime is 23157241. The reversal of 23157232 is 23275132.

It is an interprime number because it is at equal distance from previous prime (23157223) and next prime (23157241).

It is a junction number, because it is equal to n+sod(n) for n = 23157197 and 23157206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21769 + ... + 22807.

It is an arithmetic number, because the mean of its divisors is an integer number (1289600).

Almost surely, 2^23157232 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 23157232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25792000).

23157232 is an abundant number, since it is smaller than the sum of its proper divisors (28426768).

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

23157232 is a wasteful number, since it uses less digits than its factorization.

23157232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1253 (or 1247 counting only the distinct ones).

The product of its digits is 2520, while the sum is 25.

The square root of 23157232 is about 4812.1961722274. The cubic root of 23157232 is about 285.0332658410.

It can be divided in two parts, 2315723 and 2, that multiplied together give a triangular number (4631446 = T₃₀₄₃).

The spelling of 23157232 in words is "twenty-three million, one hundred fifty-seven thousand, two hundred thirty-two".