231273564 has 12 divisors (see below), whose sum is σ = 539638344. Its totient is φ = 77091184.

The previous prime is 231273551. The next prime is 231273571. The reversal of 231273564 is 465372132.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×231273564² = 106974922810524192, 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 in 3 ways as a sum of consecutive naturals, for example, 9636387 + ... + 9636410.

It is an arithmetic number, because the mean of its divisors is an integer number (44969862).

Almost surely, 2^231273564 is an apocalyptic number.

It is an amenable number.

231273564 is an abundant number, since it is smaller than the sum of its proper divisors (308364780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231273564 is a wasteful number, since it uses less digits than its factorization.

231273564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19272804 (or 19272802 counting only the distinct ones).

The product of its digits is 30240, while the sum is 33.

The square root of 231273564 is about 15207.6810855567. The cubic root of 231273564 is about 613.8213608136.

The spelling of 231273564 in words is "two hundred thirty-one million, two hundred seventy-three thousand, five hundred sixty-four".