312522313 has 4 divisors (see below), whose sum is σ = 320968900. Its totient is φ = 304075728.

The previous prime is 312522289. The next prime is 312522319. The reversal of 312522313 is 313225213.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 286184889 + 26337424 = 16917^2 + 5132^2 .

It is a cyclic number.

It is not a de Polignac number, because 312522313 - 2⁵ = 312522281 is a prime.

It is a super-2 number, since 2×312522313² = 195340392245739938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312522319) 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, 4223238 + ... + 4223311.

It is an arithmetic number, because the mean of its divisors is an integer number (80242225).

Almost surely, 2^312522313 is an apocalyptic number.

It is an amenable number.

312522313 is a deficient number, since it is larger than the sum of its proper divisors (8446587).

312522313 is an equidigital number, since it uses as much as digits as its factorization.

312522313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8446586.

The product of its digits is 1080, while the sum is 22.

The square root of 312522313 is about 17678.3006253429. The cubic root of 312522313 is about 678.6205549111.

Adding to 312522313 its reverse (313225213), we get a palindrome (625747526).

The spelling of 312522313 in words is "three hundred twelve million, five hundred twenty-two thousand, three hundred thirteen".