57640331 has 8 divisors (see below), whose sum is σ = 65923584. Its totient is φ = 49369320.

The previous prime is 57640321. The next prime is 57640333. The reversal of 57640331 is 13304675.

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

It is not a de Polignac number, because 57640331 - 2¹⁸ = 57378187 is a prime.

It is a super-2 number, since 2×57640331² = 6644815515579122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 57640294 and 57640303.

It is not an unprimeable number, because it can be changed into a prime (57640333) 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, 11966 + ... + 16076.

It is an arithmetic number, because the mean of its divisors is an integer number (8240448).

Almost surely, 2^57640331 is an apocalyptic number.

57640331 is a deficient number, since it is larger than the sum of its proper divisors (8283253).

57640331 is a wasteful number, since it uses less digits than its factorization.

57640331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6121.

The product of its (nonzero) digits is 7560, while the sum is 29.

The square root of 57640331 is about 7592.1229573816. The cubic root of 57640331 is about 386.2858697395.

The spelling of 57640331 in words is "fifty-seven million, six hundred forty thousand, three hundred thirty-one".