23131587 has 16 divisors (see below), whose sum is σ = 31553280. Its totient is φ = 15069600.

The previous prime is 23131573. The next prime is 23131601. The reversal of 23131587 is 78513132.

It is an interprime number because it is at equal distance from previous prime (23131573) and next prime (23131601).

It is not a de Polignac number, because 23131587 - 2⁶ = 23131523 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23131517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27489 + ... + 28317.

It is an arithmetic number, because the mean of its divisors is an integer number (1972080).

Almost surely, 2^23131587 is an apocalyptic number.

23131587 is a deficient number, since it is larger than the sum of its proper divisors (8421693).

23131587 is a wasteful number, since it uses less digits than its factorization.

23131587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1034.

The product of its digits is 5040, while the sum is 30.

The square root of 23131587 is about 4809.5308503013. The cubic root of 23131587 is about 284.9280089018.

The spelling of 23131587 in words is "twenty-three million, one hundred thirty-one thousand, five hundred eighty-seven".