23131396 has 12 divisors (see below), whose sum is σ = 40897948. Its totient is φ = 11446272.

The previous prime is 23131393. The next prime is 23131429. The reversal of 23131396 is 69313132.

It can be written as a sum of positive squares in 2 ways, for example, as 18662400 + 4468996 = 4320^2 + 2114^2 .

It is a super-2 number, since 2×23131396² = 1070122961817632, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23131391) 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, 29421 + ... + 30196.

Almost surely, 2^23131396 is an apocalyptic number.

It is an amenable number.

23131396 is a deficient number, since it is larger than the sum of its proper divisors (17766552).

23131396 is a wasteful number, since it uses less digits than its factorization.

23131396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59718 (or 59716 counting only the distinct ones).

The product of its digits is 2916, while the sum is 28.

The square root of 23131396 is about 4809.5109938537. The cubic root of 23131396 is about 284.9272246726.

The spelling of 23131396 in words is "twenty-three million, one hundred thirty-one thousand, three hundred ninety-six".