521299212 has 24 divisors (see below), whose sum is σ = 1390131456. Its totient is φ = 148942608.

The previous prime is 521299199. The next prime is 521299213. The reversal of 521299212 is 212992125.

It is not an unprimeable number, because it can be changed into a prime (521299213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3102888 + ... + 3103055.

It is an arithmetic number, because the mean of its divisors is an integer number (57922144).

Almost surely, 2^521299212 is an apocalyptic number.

It is an amenable number.

521299212 is an abundant number, since it is smaller than the sum of its proper divisors (868832244).

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

521299212 is a wasteful number, since it uses less digits than its factorization.

521299212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6205957 (or 6205955 counting only the distinct ones).

The product of its digits is 6480, while the sum is 33.

The square root of 521299212 is about 22831.9778381112. The cubic root of 521299212 is about 804.8143094967.

The spelling of 521299212 in words is "five hundred twenty-one million, two hundred ninety-nine thousand, two hundred twelve".