57107561 has 4 divisors (see below), whose sum is σ = 65265792. Its totient is φ = 48949332.

The previous prime is 57107543. The next prime is 57107563. The reversal of 57107561 is 16570175.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 57107561 - 2²² = 52913257 is a prime.

It is a super-2 number, since 2×57107561² = 6522547046737442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57107563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4079105 + ... + 4079118.

It is an arithmetic number, because the mean of its divisors is an integer number (16316448).

Almost surely, 2^57107561 is an apocalyptic number.

It is an amenable number.

57107561 is a deficient number, since it is larger than the sum of its proper divisors (8158231).

57107561 is an equidigital number, since it uses as much as digits as its factorization.

57107561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8158230.

The product of its (nonzero) digits is 7350, while the sum is 32.

The square root of 57107561 is about 7556.9544791536. The cubic root of 57107561 is about 385.0920362413.

The spelling of 57107561 in words is "fifty-seven million, one hundred seven thousand, five hundred sixty-one".