521211452 has 12 divisors (see below), whose sum is σ = 936772200. Its totient is φ = 253562256.

The previous prime is 521211451. The next prime is 521211469. The reversal of 521211452 is 254112125.

It is a super-2 number, since 2×521211452² = 543322755391896608, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521211451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1760702 + ... + 1760997.

It is an arithmetic number, because the mean of its divisors is an integer number (78064350).

Almost surely, 2^521211452 is an apocalyptic number.

It is an amenable number.

521211452 is a deficient number, since it is larger than the sum of its proper divisors (415560748).

521211452 is a wasteful number, since it uses less digits than its factorization.

521211452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3521740 (or 3521738 counting only the distinct ones).

The product of its digits is 800, while the sum is 23.

The square root of 521211452 is about 22830.0558913026. The cubic root of 521211452 is about 804.7691438375.

Adding to 521211452 its reverse (254112125), we get a palindrome (775323577).

The spelling of 521211452 in words is "five hundred twenty-one million, two hundred eleven thousand, four hundred fifty-two".