56531222 has 16 divisors (see below), whose sum is σ = 97947792. Its totient is φ = 24184320.

The previous prime is 56531219. The next prime is 56531249. The reversal of 56531222 is 22213565.

It is a junction number, because it is equal to n+sod(n) for n = 56531191 and 56531200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75203 + ... + 75950.

It is an arithmetic number, because the mean of its divisors is an integer number (6121737).

Almost surely, 2^56531222 is an apocalyptic number.

56531222 is a deficient number, since it is larger than the sum of its proper divisors (41416570).

56531222 is a wasteful number, since it uses less digits than its factorization.

56531222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151183.

The product of its digits is 3600, while the sum is 26.

The square root of 56531222 is about 7518.7247588936. The cubic root of 56531222 is about 383.7921826541.

Adding to 56531222 its reverse (22213565), we get a palindrome (78744787).

The spelling of 56531222 in words is "fifty-six million, five hundred thirty-one thousand, two hundred twenty-two".