521200252 has 12 divisors (see below), whose sum is σ = 912260776. Its totient is φ = 260554320.

The previous prime is 521200247. The next prime is 521200289. The reversal of 521200252 is 252002125.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35938 + ... + 48310.

Almost surely, 2^521200252 is an apocalyptic number.

It is an amenable number.

521200252 is a deficient number, since it is larger than the sum of its proper divisors (391060524).

521200252 is a wasteful number, since it uses less digits than its factorization.

521200252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22908 (or 22906 counting only the distinct ones).

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

The square root of 521200252 is about 22829.8105993020. The cubic root of 521200252 is about 804.7633793959.

Adding to 521200252 its reverse (252002125), we get a palindrome (773202377).

The spelling of 521200252 in words is "five hundred twenty-one million, two hundred thousand, two hundred fifty-two".