56221722 has 64 divisors (see below), whose sum is σ = 135158400. Its totient is φ = 17262720.

The previous prime is 56221721. The next prime is 56221727. The reversal of 56221722 is 22712265.

56221722 is a `hidden beast` number, since 5 + 622 + 17 + 22 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (56221721) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37222 + ... + 38702.

It is an arithmetic number, because the mean of its divisors is an integer number (2111850).

Almost surely, 2^56221722 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 56221722, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67579200).

56221722 is an abundant number, since it is smaller than the sum of its proper divisors (78936678).

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

56221722 is a wasteful number, since it uses less digits than its factorization.

56221722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1548 (or 1542 counting only the distinct ones).

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

The square root of 56221722 is about 7498.1145630085. The cubic root of 56221722 is about 383.0904989215.

Adding to 56221722 its reverse (22712265), we get a palindrome (78933987).

The spelling of 56221722 in words is "fifty-six million, two hundred twenty-one thousand, seven hundred twenty-two".