56987055 has 12 divisors (see below), whose sum is σ = 98777640. Its totient is φ = 30393072.

The previous prime is 56987039. The next prime is 56987069. The reversal of 56987055 is 55078965.

56987055 is a `hidden beast` number, since 569 + 87 + 0 + 5 + 5 = 666.

It is not a de Polignac number, because 56987055 - 2⁴ = 56987039 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 1266379 = 56987055 / (5 + 6 + 9 + 8 + 7 + 0 + 5 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 56987055.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 633145 + ... + 633234.

It is an arithmetic number, because the mean of its divisors is an integer number (8231470).

Almost surely, 2^56987055 is an apocalyptic number.

56987055 is a deficient number, since it is larger than the sum of its proper divisors (41790585).

56987055 is a wasteful number, since it uses less digits than its factorization.

56987055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1266390 (or 1266387 counting only the distinct ones).

The product of its (nonzero) digits is 378000, while the sum is 45.

The square root of 56987055 is about 7548.9770830226. The cubic root of 56987055 is about 384.8209770932.

The spelling of 56987055 in words is "fifty-six million, nine hundred eighty-seven thousand, fifty-five".