472221522 has 16 divisors (see below), whose sum is σ = 1049381280. Its totient is φ = 157407156.

The previous prime is 472221479. The next prime is 472221523. The reversal of 472221522 is 225122274.

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 (472221523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4372368 + ... + 4372475.

It is an arithmetic number, because the mean of its divisors is an integer number (65586330).

Almost surely, 2^472221522 is an apocalyptic number.

472221522 is an abundant number, since it is smaller than the sum of its proper divisors (577159758).

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

472221522 is a wasteful number, since it uses less digits than its factorization.

472221522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8744854 (or 8744848 counting only the distinct ones).

The product of its digits is 4480, while the sum is 27.

The square root of 472221522 is about 21730.6585726250. The cubic root of 472221522 is about 778.7210698235.

Adding to 472221522 its reverse (225122274), we get a palindrome (697343796).

It can be divided in two parts, 4722 and 21522, that added together give a square (26244 = 162²).

The spelling of 472221522 in words is "four hundred seventy-two million, two hundred twenty-one thousand, five hundred twenty-two".