1231315056 has 30 divisors (see below), whose sum is σ = 3445972400. Its totient is φ = 410438304.

The previous prime is 1231314983. The next prime is 1231315081. The reversal of 1231315056 is 6505131321.

1231315056 is a `hidden beast` number, since 1 + 23 + 131 + 505 + 6 = 666.

It is a super-2 number, since 2×1231315056² = 3032273534264566272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 4275256 + ... + 4275543.

Almost surely, 2^1231315056 is an apocalyptic number.

1231315056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1231315056 is an abundant number, since it is smaller than the sum of its proper divisors (2214657344).

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

1231315056 is a wasteful number, since it uses less digits than its factorization.

1231315056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8550813 (or 8550804 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 1231315056 is about 35090.0991164174. The cubic root of 1231315056 is about 1071.8229779352.

Adding to 1231315056 its reverse (6505131321), we get a palindrome (7736446377).

The spelling of 1231315056 in words is "one billion, two hundred thirty-one million, three hundred fifteen thousand, fifty-six".