521473252 has 12 divisors (see below), whose sum is σ = 912798460. Its totient is φ = 260673696.

The previous prime is 521473247. The next prime is 521473279. The reversal of 521473252 is 252374125.

It can be written as a sum of positive squares in 2 ways, for example, as 418775296 + 102697956 = 20464^2 + 10134^2 .

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, 6358 + ... + 32914.

Almost surely, 2^521473252 is an apocalyptic number.

It is an amenable number.

521473252 is a deficient number, since it is larger than the sum of its proper divisors (391325208).

521473252 is a wasteful number, since it uses less digits than its factorization.

521473252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31470 (or 31468 counting only the distinct ones).

The product of its digits is 16800, while the sum is 31.

The square root of 521473252 is about 22835.7888412027. The cubic root of 521473252 is about 804.9038641417.

The spelling of 521473252 in words is "five hundred twenty-one million, four hundred seventy-three thousand, two hundred fifty-two".