313400521 has 6 divisors (see below), whose sum is σ = 364568010. Its totient is φ = 268628976.

The previous prime is 313400519. The next prime is 313400543. The reversal of 313400521 is 125004313.

It can be written as a sum of positive squares in only one way, i.e., 293642496 + 19758025 = 17136^2 + 4445^2 .

It is not a de Polignac number, because 313400521 - 2¹ = 313400519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (313404521) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3197916 + ... + 3198013.

It is an arithmetic number, because the mean of its divisors is an integer number (60761335).

Almost surely, 2^313400521 is an apocalyptic number.

It is an amenable number.

313400521 is a deficient number, since it is larger than the sum of its proper divisors (51167489).

313400521 is an equidigital number, since it uses as much as digits as its factorization.

313400521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6395943 (or 6395936 counting only the distinct ones).

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

The square root of 313400521 is about 17703.1217868488. The cubic root of 313400521 is about 679.2556163742.

Adding to 313400521 its reverse (125004313), we get a palindrome (438404834).

The spelling of 313400521 in words is "three hundred thirteen million, four hundred thousand, five hundred twenty-one".