231433564 has 6 divisors (see below), whose sum is σ = 405008744. Its totient is φ = 115716780.

The previous prime is 231433549. The next prime is 231433571. The reversal of 231433564 is 465334132.

It is a super-2 number, since 2×231433564² = 107122989091484192, 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 as a sum of consecutive naturals, namely, 28929192 + ... + 28929199.

Almost surely, 2^231433564 is an apocalyptic number.

It is an amenable number.

231433564 is a deficient number, since it is larger than the sum of its proper divisors (173575180).

231433564 is a wasteful number, since it uses less digits than its factorization.

231433564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57858395 (or 57858393 counting only the distinct ones).

The product of its digits is 25920, while the sum is 31.

The square root of 231433564 is about 15212.9406756222. The cubic root of 231433564 is about 613.9628797670.

Adding to 231433564 its reverse (465334132), we get a palindrome (696767696).

The spelling of 231433564 in words is "two hundred thirty-one million, four hundred thirty-three thousand, five hundred sixty-four".