23251564 has 12 divisors (see below), whose sum is σ = 46503184. Its totient is φ = 9964944.

The previous prime is 23251559. The next prime is 23251589. The reversal of 23251564 is 46515232.

23251564 is an admirable number.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 830413 = 23251564 / (2 + 3 + 2 + 5 + 1 + 5 + 6 + 4).

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, 415179 + ... + 415234.

Almost surely, 2^23251564 is an apocalyptic number.

It is an amenable number.

23251564 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

23251564 is a wasteful number, since it uses less digits than its factorization.

23251564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 830424 (or 830422 counting only the distinct ones).

The product of its digits is 7200, while the sum is 28.

The square root of 23251564 is about 4821.9875570142. The cubic root of 23251564 is about 285.4197733324.

Adding to 23251564 its reverse (46515232), we get a palindrome (69766796).

The spelling of 23251564 in words is "twenty-three million, two hundred fifty-one thousand, five hundred sixty-four".