56757320531 has 4 divisors (see below), whose sum is σ = 58141645464. Its totient is φ = 55372995600.

The previous prime is 56757320527. The next prime is 56757320539. The reversal of 56757320531 is 13502375765.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 56757320531 - 2² = 56757320527 is a prime.

It is a super-2 number, since 2×56757320531² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56757320539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 692162405 + ... + 692162486.

It is an arithmetic number, because the mean of its divisors is an integer number (14535411366).

Almost surely, 2^56757320531 is an apocalyptic number.

56757320531 is a deficient number, since it is larger than the sum of its proper divisors (1384324933).

56757320531 is a wasteful number, since it uses less digits than its factorization.

56757320531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1384324932.

The product of its (nonzero) digits is 661500, while the sum is 44.

The spelling of 56757320531 in words is "fifty-six billion, seven hundred fifty-seven million, three hundred twenty thousand, five hundred thirty-one".