56007557 has 4 divisors (see below), whose sum is σ = 56054796. Its totient is φ = 55960320.

The previous prime is 56007493. The next prime is 56007559. The reversal of 56007557 is 75570065.

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 40883236 + 15124321 = 6394^2 + 3889^2 .

It is a cyclic number.

It is not a de Polignac number, because 56007557 - 2⁶ = 56007493 is a prime.

It is a super-2 number, since 2×56007557² = 6273692882216498, 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 (56007559) 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, 21794 + ... + 24227.

It is an arithmetic number, because the mean of its divisors is an integer number (14013699).

Almost surely, 2^56007557 is an apocalyptic number.

It is an amenable number.

56007557 is a deficient number, since it is larger than the sum of its proper divisors (47239).

56007557 is a wasteful number, since it uses less digits than its factorization.

56007557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47238.

The product of its (nonzero) digits is 36750, while the sum is 35.

The square root of 56007557 is about 7483.8196798159. The cubic root of 56007557 is about 382.6034453292.

The spelling of 56007557 in words is "fifty-six million, seven thousand, five hundred fifty-seven".