23131395 has 24 divisors (see below), whose sum is σ = 45822816. Its totient is φ = 10574208.

The previous prime is 23131393. The next prime is 23131429. The reversal of 23131395 is 59313132.

It is a happy number.

It is not a de Polignac number, because 23131395 - 2¹ = 23131393 is a prime.

It is a super-2 number, since 2×23131395² = 1070122869292050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23131391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36402 + ... + 37031.

It is an arithmetic number, because the mean of its divisors is an integer number (1909284).

Almost surely, 2^23131395 is an apocalyptic number.

23131395 is a deficient number, since it is larger than the sum of its proper divisors (22691421).

23131395 is a wasteful number, since it uses less digits than its factorization.

23131395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73451 (or 73448 counting only the distinct ones).

The product of its digits is 2430, while the sum is 27.

The square root of 23131395 is about 4809.5108898931. The cubic root of 23131395 is about 284.9272205667.

It can be divided in two parts, 231 and 31395, that added together give a triangular number (31626 = T₂₅₁).

The spelling of 23131395 in words is "twenty-three million, one hundred thirty-one thousand, three hundred ninety-five".