522212500 has 36 divisors (see below), whose sum is σ = 1142294076. Its totient is φ = 208880000.

The previous prime is 522212497. The next prime is 522212501. The reversal of 522212500 is 5212225.

It can be written as a sum of positive squares in 6 ways, for example, as 452923524 + 69288976 = 21282^2 + 8324^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (522212501) 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, 8389 + ... + 33388.

It is an arithmetic number, because the mean of its divisors is an integer number (31730391).

Almost surely, 2^522212500 is an apocalyptic number.

522212500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

522212500 is an abundant number, since it is smaller than the sum of its proper divisors (620081576).

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

522212500 is an equidigital number, since it uses as much as digits as its factorization.

522212500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41806 (or 41784 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 522212500 is about 22851.9692805675. The cubic root of 522212500 is about 805.2840323282.

Adding to 522212500 its reverse (5212225), we get a palindrome (527424725).

The spelling of 522212500 in words is "five hundred twenty-two million, two hundred twelve thousand, five hundred".