1231316572 has 12 divisors (see below), whose sum is σ = 2155502440. Its totient is φ = 615458736.

The previous prime is 1231316561. The next prime is 1231316651. The reversal of 1231316572 is 2756131321.

It is a happy number.

It is a super-2 number, since 2×1231316572² = 3032281000963662368, 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, 35547 + ... + 61042.

Almost surely, 2^1231316572 is an apocalyptic number.

It is an amenable number.

1231316572 is a deficient number, since it is larger than the sum of its proper divisors (924185868).

1231316572 is a wasteful number, since it uses less digits than its factorization.

1231316572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99780 (or 99778 counting only the distinct ones).

The product of its digits is 7560, while the sum is 31.

The square root of 1231316572 is about 35090.1207179457. The cubic root of 1231316572 is about 1071.8234178126.

Adding to 1231316572 its reverse (2756131321), we get a palindrome (3987447893).

The spelling of 1231316572 in words is "one billion, two hundred thirty-one million, three hundred sixteen thousand, five hundred seventy-two".