23131885 has 16 divisors (see below), whose sum is σ = 31824000. Its totient is φ = 15811776.

The previous prime is 23131877. The next prime is 23131897. The reversal of 23131885 is 58813132.

It is a cyclic number.

It is not a de Polignac number, because 23131885 - 2³ = 23131877 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12766 + ... + 14464.

It is an arithmetic number, because the mean of its divisors is an integer number (1989000).

Almost surely, 2^23131885 is an apocalyptic number.

It is an amenable number.

23131885 is a deficient number, since it is larger than the sum of its proper divisors (8692115).

23131885 is a wasteful number, since it uses less digits than its factorization.

23131885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2100.

The product of its digits is 5760, while the sum is 31.

The square root of 23131885 is about 4809.5618303542. The cubic root of 23131885 is about 284.9292324550.

The spelling of 23131885 in words is "twenty-three million, one hundred thirty-one thousand, eight hundred eighty-five".