56621322 has 64 divisors (see below), whose sum is σ = 136909440. Its totient is φ = 17273088.

The previous prime is 56621317. The next prime is 56621351. The reversal of 56621322 is 22312665.

56621322 is a `hidden beast` number, since 5 + 6 + 621 + 32 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33133 + ... + 34799.

It is an arithmetic number, because the mean of its divisors is an integer number (2139210).

Almost surely, 2^56621322 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56621322, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68454720).

56621322 is an abundant number, since it is smaller than the sum of its proper divisors (80288118).

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

56621322 is a wasteful number, since it uses less digits than its factorization.

56621322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1732 (or 1726 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 56621322 is about 7524.7140809469. The cubic root of 56621322 is about 383.9959716374.

Adding to 56621322 its reverse (22312665), we get a palindrome (78933987).

The spelling of 56621322 in words is "fifty-six million, six hundred twenty-one thousand, three hundred twenty-two".