313521311 has 4 divisors (see below), whose sum is σ = 315777000. Its totient is φ = 311265624.

The previous prime is 313521283. The next prime is 313521323. The reversal of 313521311 is 113125313.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-313521311 is a prime.

It is a super-2 number, since 2×313521311² = 196591224902317442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313521371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1127636 + ... + 1127913.

It is an arithmetic number, because the mean of its divisors is an integer number (78944250).

Almost surely, 2^313521311 is an apocalyptic number.

313521311 is a deficient number, since it is larger than the sum of its proper divisors (2255689).

313521311 is a wasteful number, since it uses less digits than its factorization.

313521311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2255688.

The product of its digits is 270, while the sum is 20.

The square root of 313521311 is about 17706.5330033861. The cubic root of 313521311 is about 679.3428707998.

Adding to 313521311 its reverse (113125313), we get a palindrome (426646624).

The spelling of 313521311 in words is "three hundred thirteen million, five hundred twenty-one thousand, three hundred eleven".