23625581 has 4 divisors (see below), whose sum is σ = 27000672. Its totient is φ = 20250492.

The previous prime is 23625571. The next prime is 23625643. The reversal of 23625581 is 18552632.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23625581 is a prime.

It is a super-2 number, since 2×23625581² = 1116336155175122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23625521) 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, 1687535 + ... + 1687548.

It is an arithmetic number, because the mean of its divisors is an integer number (6750168).

Almost surely, 2^23625581 is an apocalyptic number.

It is an amenable number.

23625581 is a deficient number, since it is larger than the sum of its proper divisors (3375091).

23625581 is an equidigital number, since it uses as much as digits as its factorization.

23625581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3375090.

The product of its digits is 14400, while the sum is 32.

The square root of 23625581 is about 4860.6152902693. The cubic root of 23625581 is about 286.9420295934.

The spelling of 23625581 in words is "twenty-three million, six hundred twenty-five thousand, five hundred eighty-one".