521313400 has 48 divisors (see below), whose sum is σ = 1264762800. Its totient is φ = 199457280.

The previous prime is 521313389. The next prime is 521313413. The reversal of 521313400 is 4313125.

It is a super-2 number, since 2×521313400² = 543535322039120000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52065 + ... + 61264.

It is an arithmetic number, because the mean of its divisors is an integer number (26349225).

Almost surely, 2^521313400 is an apocalyptic number.

521313400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

521313400 is an abundant number, since it is smaller than the sum of its proper divisors (743449400).

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

521313400 is a wasteful number, since it uses less digits than its factorization.

521313400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113368 (or 113359 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 521313400 is about 22832.2885405734. The cubic root of 521313400 is about 804.8216108709.

Adding to 521313400 its reverse (4313125), we get a palindrome (525626525).

The spelling of 521313400 in words is "five hundred twenty-one million, three hundred thirteen thousand, four hundred".