57107861 has 4 divisors (see below), whose sum is σ = 57235500. Its totient is φ = 56980224.

The previous prime is 57107851. The next prime is 57107881. The reversal of 57107861 is 16870175.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14205361 + 42902500 = 3769^2 + 6550^2 .

It is a cyclic number.

It is not a de Polignac number, because 57107861 - 2¹⁴ = 57091477 is a prime.

It is a super-2 number, since 2×57107861² = 6522615575990642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57107801) 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, 63146 + ... + 64043.

It is an arithmetic number, because the mean of its divisors is an integer number (14308875).

Almost surely, 2^57107861 is an apocalyptic number.

It is an amenable number.

57107861 is a deficient number, since it is larger than the sum of its proper divisors (127639).

57107861 is a wasteful number, since it uses less digits than its factorization.

57107861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127638.

The product of its (nonzero) digits is 11760, while the sum is 35.

The square root of 57107861 is about 7556.9743283936. The cubic root of 57107861 is about 385.0927105677.

The spelling of 57107861 in words is "fifty-seven million, one hundred seven thousand, eight hundred sixty-one".