522023220 has 36 divisors (see below), whose sum is σ = 1583470980. Its totient is φ = 139206144.

The previous prime is 522023207. The next prime is 522023221. The reversal of 522023220 is 22320225.

It can be written as a sum of positive squares in 2 ways, for example, as 199317924 + 322705296 = 14118^2 + 17964^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 522023193 and 522023202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (522023221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1449885 + ... + 1450244.

It is an arithmetic number, because the mean of its divisors is an integer number (43985305).

Almost surely, 2^522023220 is an apocalyptic number.

It is an amenable number.

522023220 is an abundant number, since it is smaller than the sum of its proper divisors (1061447760).

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

522023220 is a wasteful number, since it uses less digits than its factorization.

522023220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2900144 (or 2900139 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 522023220 is about 22847.8274678360. The cubic root of 522023220 is about 805.1867267415.

Adding to 522023220 its reverse (22320225), we get a palindrome (544343445).

The spelling of 522023220 in words is "five hundred twenty-two million, twenty-three thousand, two hundred twenty".