311313313 has 4 divisors (see below), whose sum is σ = 311446660. Its totient is φ = 311179968.

The previous prime is 311313307. The next prime is 311313319. The reversal of 311313313 is 313313113.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (311313307) and next prime (311313319).

It can be written as a sum of positive squares in 2 ways, for example, as 226893969 + 84419344 = 15063^2 + 9188^2 .

It is a cyclic number.

It is not a de Polignac number, because 311313313 - 2⁹ = 311312801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311313319) 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, 63108 + ... + 67861.

It is an arithmetic number, because the mean of its divisors is an integer number (77861665).

Almost surely, 2^311313313 is an apocalyptic number.

It is an amenable number.

311313313 is a deficient number, since it is larger than the sum of its proper divisors (133347).

311313313 is a wasteful number, since it uses less digits than its factorization.

311313313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133346.

The product of its digits is 243, while the sum is 19.

The square root of 311313313 is about 17644.0730275070. The cubic root of 311313313 is about 677.7443374635.

Adding to 311313313 its reverse (313313113), we get a palindrome (624626426).

The spelling of 311313313 in words is "three hundred eleven million, three hundred thirteen thousand, three hundred thirteen".