521442204 has 24 divisors (see below), whose sum is σ = 1218392448. Its totient is φ = 173572080.

The previous prime is 521442203. The next prime is 521442217. The reversal of 521442204 is 402244125.

It is a happy number.

It is a super-2 number, since 2×521442204² = 543803944224755232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521442203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21162 + ... + 38609.

It is an arithmetic number, because the mean of its divisors is an integer number (50766352).

Almost surely, 2^521442204 is an apocalyptic number.

It is an amenable number.

521442204 is an abundant number, since it is smaller than the sum of its proper divisors (696950244).

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

521442204 is a wasteful number, since it uses less digits than its factorization.

521442204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60505 (or 60503 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 24.

The square root of 521442204 is about 22835.1090209791. The cubic root of 521442204 is about 804.8878894321.

Adding to 521442204 its reverse (402244125), we get a palindrome (923686329).

The spelling of 521442204 in words is "five hundred twenty-one million, four hundred forty-two thousand, two hundred four".