56172222 has 24 divisors (see below), whose sum is σ = 121965480. Its totient is φ = 18684240.

The previous prime is 56172203. The next prime is 56172223. The reversal of 56172222 is 22227165.

56172222 is a `hidden beast` number, since 5 + 617 + 22 + 22 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56172223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6097 + ... + 12227.

It is an arithmetic number, because the mean of its divisors is an integer number (5081895).

Almost surely, 2^56172222 is an apocalyptic number.

56172222 is an abundant number, since it is smaller than the sum of its proper divisors (65793258).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

56172222 is a wasteful number, since it uses less digits than its factorization.

56172222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6648 (or 6645 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 56172222 is about 7494.8130063398. The cubic root of 56172222 is about 382.9780361757.

Adding to 56172222 its reverse (22227165), we get a palindrome (78399387).

The spelling of 56172222 in words is "fifty-six million, one hundred seventy-two thousand, two hundred twenty-two".