56381559 has 16 divisors (see below), whose sum is σ = 82488672. Its totient is φ = 34040448.

The previous prime is 56381551. The next prime is 56381587. The reversal of 56381559 is 95518365.

It is not a de Polignac number, because 56381559 - 2³ = 56381551 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56381559.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56381551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11572 + ... + 15705.

It is an arithmetic number, because the mean of its divisors is an integer number (5155542).

Almost surely, 2^56381559 is an apocalyptic number.

56381559 is a deficient number, since it is larger than the sum of its proper divisors (26107113).

56381559 is a wasteful number, since it uses less digits than its factorization.

56381559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27346.

The product of its digits is 162000, while the sum is 42.

The square root of 56381559 is about 7508.7654777600. The cubic root of 56381559 is about 383.4531944438.

The spelling of 56381559 in words is "fifty-six million, three hundred eighty-one thousand, five hundred fifty-nine".