57521745 has 56 divisors (see below), whose sum is σ = 106187136. Its totient is φ = 29883168.

The previous prime is 57521713. The next prime is 57521747. The reversal of 57521745 is 54712575.

It is not a de Polignac number, because 57521745 - 2⁵ = 57521713 is a prime.

It is a super-2 number, since 2×57521745² = 6617502295690050, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (57521747) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 156552 + ... + 156918.

Almost surely, 2^57521745 is an apocalyptic number.

It is an amenable number.

57521745 is a deficient number, since it is larger than the sum of its proper divisors (48665391).

57521745 is an equidigital number, since it uses as much as digits as its factorization.

57521745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433 (or 418 counting only the distinct ones).

The product of its digits is 49000, while the sum is 36.

The square root of 57521745 is about 7584.3091313580. The cubic root of 57521745 is about 386.0207801998.

The spelling of 57521745 in words is "fifty-seven million, five hundred twenty-one thousand, seven hundred forty-five".