57215345531 has 8 divisors (see below), whose sum is σ = 57827758464. Its totient is φ = 56603393280.

The previous prime is 57215345497. The next prime is 57215345557. The reversal of 57215345531 is 13554351275.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 57215345531 - 2³⁴ = 40035476347 is a prime.

It is a super-2 number, since 2×57215345531² (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 (57215345591) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137501 + ... + 365153.

It is an arithmetic number, because the mean of its divisors is an integer number (7228469808).

Almost surely, 2^57215345531 is an apocalyptic number.

57215345531 is a deficient number, since it is larger than the sum of its proper divisors (612412933).

57215345531 is a wasteful number, since it uses less digits than its factorization.

57215345531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230341.

The product of its digits is 315000, while the sum is 41.

The spelling of 57215345531 in words is "fifty-seven billion, two hundred fifteen million, three hundred forty-five thousand, five hundred thirty-one".