57511397 has 8 divisors (see below), whose sum is σ = 59525592. Its totient is φ = 55526400.

The previous prime is 57511387. The next prime is 57511403. The reversal of 57511397 is 79311575.

It can be written as a sum of positive squares in 4 ways, for example, as 2172676 + 55338721 = 1474^2 + 7439^2 .

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 57511397 - 2⁴ = 57511381 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 57511397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57511327) 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, 3254 + ... + 11207.

It is an arithmetic number, because the mean of its divisors is an integer number (7440699).

Almost surely, 2^57511397 is an apocalyptic number.

It is an amenable number.

57511397 is a deficient number, since it is larger than the sum of its proper divisors (2014195).

57511397 is a wasteful number, since it uses less digits than its factorization.

57511397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14599.

The product of its digits is 33075, while the sum is 38.

The square root of 57511397 is about 7583.6269027425. The cubic root of 57511397 is about 385.9976307943.

It can be divided in two parts, 575113 and 97, that multiplied together give a square (55785961 = 7469²).

The spelling of 57511397 in words is "fifty-seven million, five hundred eleven thousand, three hundred ninety-seven".