56561379 has 16 divisors (see below), whose sum is σ = 87080448. Its totient is φ = 31986432.

The previous prime is 56561371. The next prime is 56561381. The reversal of 56561379 is 97316565.

It is a happy number.

It is not a de Polignac number, because 56561379 - 2³ = 56561371 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56561379.

It is not an unprimeable number, because it can be changed into a prime (56561371) 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, 11847 + ... + 15920.

It is an arithmetic number, because the mean of its divisors is an integer number (5442528).

Almost surely, 2^56561379 is an apocalyptic number.

56561379 is a deficient number, since it is larger than the sum of its proper divisors (30519069).

56561379 is a wasteful number, since it uses less digits than its factorization.

56561379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27874.

The product of its digits is 170100, while the sum is 42.

The square root of 56561379 is about 7520.7299512747. The cubic root of 56561379 is about 383.8604161186.

The spelling of 56561379 in words is "fifty-six million, five hundred sixty-one thousand, three hundred seventy-nine".