57397031 has 4 divisors (see below), whose sum is σ = 57420312. Its totient is φ = 57373752.

The previous prime is 57397013. The next prime is 57397033. The reversal of 57397031 is 13079375.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57397031 is a prime.

It is a super-2 number, since 2×57397031² = 6588838335229922, 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 = 57396982 and 57397000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57397033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7436 + ... + 13041.

It is an arithmetic number, because the mean of its divisors is an integer number (14355078).

Almost surely, 2^57397031 is an apocalyptic number.

57397031 is a deficient number, since it is larger than the sum of its proper divisors (23281).

57397031 is a wasteful number, since it uses less digits than its factorization.

57397031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23280.

The product of its (nonzero) digits is 19845, while the sum is 35.

The square root of 57397031 is about 7576.0828268968. The cubic root of 57397031 is about 385.7415986472.

The spelling of 57397031 in words is "fifty-seven million, three hundred ninety-seven thousand, thirty-one".