313312557 has 4 divisors (see below), whose sum is σ = 417750080. Its totient is φ = 208875036.

The previous prime is 313312523. The next prime is 313312579. The reversal of 313312557 is 755213313.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 755213313 = 3 ⋅251737771.

It is not a de Polignac number, because 313312557 - 2¹⁰ = 313311533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313312457) 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, 52218757 + ... + 52218762.

It is an arithmetic number, because the mean of its divisors is an integer number (104437520).

Almost surely, 2^313312557 is an apocalyptic number.

It is an amenable number.

313312557 is a deficient number, since it is larger than the sum of its proper divisors (104437523).

313312557 is a wasteful number, since it uses less digits than its factorization.

313312557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104437522.

The product of its digits is 9450, while the sum is 30.

The square root of 313312557 is about 17700.6371919205. The cubic root of 313312557 is about 679.1920601811.

The spelling of 313312557 in words is "three hundred thirteen million, three hundred twelve thousand, five hundred fifty-seven".