57497581 has 2 divisors, whose sum is σ = 57497582. Its totient is φ = 57497580.

The previous prime is 57497569. The next prime is 57497597. The reversal of 57497581 is 18579475.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31741956 + 25755625 = 5634^2 + 5075^2 .

It is a cyclic number.

It is not a de Polignac number, because 57497581 - 2²⁵ = 23943149 is a prime.

It is a super-2 number, since 2×57497581² = 6611943641703122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57497521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28748790 + 28748791.

It is an arithmetic number, because the mean of its divisors is an integer number (28748791).

Almost surely, 2^57497581 is an apocalyptic number.

It is an amenable number.

57497581 is a deficient number, since it is larger than the sum of its proper divisors (1).

57497581 is an equidigital number, since it uses as much as digits as its factorization.

57497581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 352800, while the sum is 46.

The square root of 57497581 is about 7582.7159382374. The cubic root of 57497581 is about 385.9667188323.

The spelling of 57497581 in words is "fifty-seven million, four hundred ninety-seven thousand, five hundred eighty-one".