56505279 has 16 divisors (see below), whose sum is σ = 76737024. Its totient is φ = 36976800.

The previous prime is 56505277. The next prime is 56505283. The reversal of 56505279 is 97250565.

It is not a de Polignac number, because 56505279 - 2¹ = 56505277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56505277) 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, 65817 + ... + 66669.

It is an arithmetic number, because the mean of its divisors is an integer number (4796064).

Almost surely, 2^56505279 is an apocalyptic number.

56505279 is a deficient number, since it is larger than the sum of its proper divisors (20231745).

56505279 is a wasteful number, since it uses less digits than its factorization.

56505279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1238.

The product of its (nonzero) digits is 94500, while the sum is 39.

The square root of 56505279 is about 7516.9993348410. Note that the first 3 decimals coincide. The cubic root of 56505279 is about 383.7334643994.

The spelling of 56505279 in words is "fifty-six million, five hundred five thousand, two hundred seventy-nine".