553221522 has 64 divisors (see below), whose sum is σ = 1411522560. Its totient is φ = 157330512.

The previous prime is 553221503. The next prime is 553221523. The reversal of 553221522 is 225122355.

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 (553221523) 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, 81013 + ... + 87575.

It is an arithmetic number, because the mean of its divisors is an integer number (22055040).

Almost surely, 2^553221522 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 553221522, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (705761280).

553221522 is an abundant number, since it is smaller than the sum of its proper divisors (858301038).

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

553221522 is a wasteful number, since it uses less digits than its factorization.

553221522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6804 (or 6798 counting only the distinct ones).

The product of its digits is 6000, while the sum is 27.

The square root of 553221522 is about 23520.6615978378. The cubic root of 553221522 is about 820.9178310968.

Adding to 553221522 its reverse (225122355), we get a palindrome (778343877).

The spelling of 553221522 in words is "five hundred fifty-three million, two hundred twenty-one thousand, five hundred twenty-two".