56522257 has 4 divisors (see below), whose sum is σ = 61660656. Its totient is φ = 51383860.

The previous prime is 56522243. The next prime is 56522281. The reversal of 56522257 is 75222565.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 56522257 - 2⁷ = 56522129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56522237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2569183 + ... + 2569204.

It is an arithmetic number, because the mean of its divisors is an integer number (15415164).

Almost surely, 2^56522257 is an apocalyptic number.

It is an amenable number.

56522257 is a deficient number, since it is larger than the sum of its proper divisors (5138399).

56522257 is a wasteful number, since it uses less digits than its factorization.

56522257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5138398.

The product of its digits is 42000, while the sum is 34.

The square root of 56522257 is about 7518.1285570280. The cubic root of 56522257 is about 383.7718936958.

It can be divided in two parts, 565 and 22257, that added together give a palindrome (22822).

The spelling of 56522257 in words is "fifty-six million, five hundred twenty-two thousand, two hundred fifty-seven".