23531000 has 32 divisors (see below), whose sum is σ = 55064880. Its totient is φ = 9412000.

The previous prime is 23530981. The next prime is 23531017. The reversal of 23531000 is 13532.

It is a super-2 number, since 2×23531000² = 1107415922000000, which contains 22 as substring.

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, 10766 + ... + 12765.

Almost surely, 2^23531000 is an apocalyptic number.

23531000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23531000 is an abundant number, since it is smaller than the sum of its proper divisors (31533880).

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

23531000 is a wasteful number, since it uses less digits than its factorization.

23531000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23552 (or 23538 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 14.

The square root of 23531000 is about 4850.8762095110. The cubic root of 23531000 is about 286.5586095952.

Adding to 23531000 its reverse (13532), we get a palindrome (23544532).

The spelling of 23531000 in words is "twenty-three million, five hundred thirty-one thousand".