57497521 has 2 divisors, whose sum is σ = 57497522. Its totient is φ = 57497520.

The previous prime is 57497513. The next prime is 57497537. The reversal of 57497521 is 12579475.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37650496 + 19847025 = 6136^2 + 4455^2 .

It is a cyclic number.

It is not a de Polignac number, because 57497521 - 2³ = 57497513 is a prime.

It is a super-2 number, since 2×57497521² = 6611929842290882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (57497551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28748760 + 28748761.

It is an arithmetic number, because the mean of its divisors is an integer number (28748761).

Almost surely, 2^57497521 is an apocalyptic number.

It is an amenable number.

57497521 is a deficient number, since it is larger than the sum of its proper divisors (1).

57497521 is an equidigital number, since it uses as much as digits as its factorization.

57497521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 88200, while the sum is 40.

The square root of 57497521 is about 7582.7119818703. The cubic root of 57497521 is about 385.9665845773.

The spelling of 57497521 in words is "fifty-seven million, four hundred ninety-seven thousand, five hundred twenty-one".