56516857 has 4 divisors (see below), whose sum is σ = 59841396. Its totient is φ = 53192320.

The previous prime is 56516839. The next prime is 56516879. The reversal of 56516857 is 75861565.

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 32936121 + 23580736 = 5739^2 + 4856^2 .

It is not a de Polignac number, because 56516857 - 2⁷ = 56516729 is a prime.

It is a super-3 number, since 3×56516857³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56516357) 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, 1662244 + ... + 1662277.

It is an arithmetic number, because the mean of its divisors is an integer number (14960349).

Almost surely, 2^56516857 is an apocalyptic number.

It is an amenable number.

56516857 is a deficient number, since it is larger than the sum of its proper divisors (3324539).

56516857 is a wasteful number, since it uses less digits than its factorization.

56516857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3324538.

The product of its digits is 252000, while the sum is 43.

The square root of 56516857 is about 7517.7694165224. The cubic root of 56516857 is about 383.7596717598.

The spelling of 56516857 in words is "fifty-six million, five hundred sixteen thousand, eight hundred fifty-seven".