56861057 has 4 divisors (see below), whose sum is σ = 62030256. Its totient is φ = 51691860.

The previous prime is 56861041. The next prime is 56861071. The reversal of 56861057 is 75016865.

It is a happy number.

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 not a de Polignac number, because 56861057 - 2⁴ = 56861041 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56861057.

It is not an unprimeable number, because it can be changed into a prime (56861017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2584583 + ... + 2584604.

It is an arithmetic number, because the mean of its divisors is an integer number (15507564).

Almost surely, 2^56861057 is an apocalyptic number.

It is an amenable number.

56861057 is a deficient number, since it is larger than the sum of its proper divisors (5169199).

56861057 is a wasteful number, since it uses less digits than its factorization.

56861057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5169198.

The product of its (nonzero) digits is 50400, while the sum is 38.

The square root of 56861057 is about 7540.6270959384. The cubic root of 56861057 is about 384.5371556066.

The spelling of 56861057 in words is "fifty-six million, eight hundred sixty-one thousand, fifty-seven".