521023222 has 16 divisors (see below), whose sum is σ = 820557360. Its totient is φ = 247772448.

The previous prime is 521023219. The next prime is 521023253. The reversal of 521023222 is 222320125.

It is a super-2 number, since 2×521023222² = 542930395726522568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 521023222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63153 + ... + 70924.

It is an arithmetic number, because the mean of its divisors is an integer number (51284835).

Almost surely, 2^521023222 is an apocalyptic number.

521023222 is a deficient number, since it is larger than the sum of its proper divisors (299534138).

521023222 is a wasteful number, since it uses less digits than its factorization.

521023222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134175.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 521023222 is about 22825.9331025043. The cubic root of 521023222 is about 804.6722542198.

Adding to 521023222 its reverse (222320125), we get a palindrome (743343347).

The spelling of 521023222 in words is "five hundred twenty-one million, twenty-three thousand, two hundred twenty-two".