56621255 has 4 divisors (see below), whose sum is σ = 67945512. Its totient is φ = 45297000.

The previous prime is 56621207. The next prime is 56621281. The reversal of 56621255 is 55212665.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 56621255 - 2²² = 52426951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5662121 + ... + 5662130.

It is an arithmetic number, because the mean of its divisors is an integer number (16986378).

Almost surely, 2^56621255 is an apocalyptic number.

56621255 is a deficient number, since it is larger than the sum of its proper divisors (11324257).

56621255 is a wasteful number, since it uses less digits than its factorization.

56621255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11324256.

The product of its digits is 18000, while the sum is 32.

The square root of 56621255 is about 7524.7096289491. The cubic root of 56621255 is about 383.9958201766.

The spelling of 56621255 in words is "fifty-six million, six hundred twenty-one thousand, two hundred fifty-five".