57252561 has 16 divisors (see below), whose sum is σ = 78058944. Its totient is φ = 37312704.

The previous prime is 57252551. The next prime is 57252563. The reversal of 57252561 is 16525275.

It is a de Polignac number, because none of the positive numbers 2^k-57252561 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (57252563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62670 + ... + 63576.

It is an arithmetic number, because the mean of its divisors is an integer number (4878684).

Almost surely, 2^57252561 is an apocalyptic number.

It is an amenable number.

57252561 is a deficient number, since it is larger than the sum of its proper divisors (20806383).

57252561 is a wasteful number, since it uses less digits than its factorization.

57252561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1360.

The product of its digits is 21000, while the sum is 33.

The square root of 57252561 is about 7566.5422089618. The cubic root of 57252561 is about 385.4176857800.

The spelling of 57252561 in words is "fifty-seven million, two hundred fifty-two thousand, five hundred sixty-one".