311212204313 has 4 divisors (see below), whose sum is σ = 315475385268. Its totient is φ = 306949023360.

The previous prime is 311212204307. The next prime is 311212204337. The reversal of 311212204313 is 313402212113.

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 146833043344 + 164379160969 = 383188^2 + 405437^2 .

It is a cyclic number.

It is not a de Polignac number, because 311212204313 - 2¹² = 311212200217 is a prime.

It is a super-2 number, since 2×311212204313² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311212204343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2131590368 + ... + 2131590513.

It is an arithmetic number, because the mean of its divisors is an integer number (78868846317).

Almost surely, 2^311212204313 is an apocalyptic number.

It is an amenable number.

311212204313 is a deficient number, since it is larger than the sum of its proper divisors (4263180955).

311212204313 is an equidigital number, since it uses as much as digits as its factorization.

311212204313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4263180954.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 311212204313 its reverse (313402212113), we get a palindrome (624614416426).

The spelling of 311212204313 in words is "three hundred eleven billion, two hundred twelve million, two hundred four thousand, three hundred thirteen".