57123056531 has 4 divisors (see below), whose sum is σ = 57133082064. Its totient is φ = 57113031000.

The previous prime is 57123056527. The next prime is 57123056537. The reversal of 57123056531 is 13565032175.

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 57123056531 - 2² = 57123056527 is a prime.

It is a super-2 number, since 2×57123056531² (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 (57123056537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5004215 + ... + 5015616.

It is an arithmetic number, because the mean of its divisors is an integer number (14283270516).

Almost surely, 2^57123056531 is an apocalyptic number.

57123056531 is a deficient number, since it is larger than the sum of its proper divisors (10025533).

57123056531 is a wasteful number, since it uses less digits than its factorization.

57123056531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10025532.

The product of its (nonzero) digits is 94500, while the sum is 38.

The spelling of 57123056531 in words is "fifty-seven billion, one hundred twenty-three million, fifty-six thousand, five hundred thirty-one".