56131315515 has 48 divisors (see below), whose sum is σ = 106243128576. Its totient is φ = 27188539200.

The previous prime is 56131315501. The next prime is 56131315519. The reversal of 56131315515 is 51551313165.

56131315515 is a `hidden beast` number, since 5 + 6 + 1 + 3 + 131 + 5 + 515 = 666.

It is not a de Polignac number, because 56131315515 - 2¹² = 56131311419 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56131315515.

It is not an unprimeable number, because it can be changed into a prime (56131315519) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 455352 + ... + 565338.

It is an arithmetic number, because the mean of its divisors is an integer number (2213398512).

Almost surely, 2^56131315515 is an apocalyptic number.

56131315515 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

56131315515 is a deficient number, since it is larger than the sum of its proper divisors (50111813061).

56131315515 is a wasteful number, since it uses less digits than its factorization.

56131315515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111040 (or 111037 counting only the distinct ones).

The product of its digits is 33750, while the sum is 36.

The spelling of 56131315515 in words is "fifty-six billion, one hundred thirty-one million, three hundred fifteen thousand, five hundred fifteen".