311213313 has 8 divisors (see below), whose sum is σ = 461056800. Its totient is φ = 207475524.

The previous prime is 311213257. The next prime is 311213323. The reversal of 311213313 is 313312113.

It is a happy number.

311213313 is a `hidden beast` number, since 311 + 21 + 331 + 3 = 666.

It is not a de Polignac number, because 311213313 - 2¹⁰ = 311212289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (311213323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5763183 + ... + 5763236.

It is an arithmetic number, because the mean of its divisors is an integer number (57632100).

Almost surely, 2^311213313 is an apocalyptic number.

It is an amenable number.

311213313 is a deficient number, since it is larger than the sum of its proper divisors (149843487).

311213313 is a wasteful number, since it uses less digits than its factorization.

311213313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11526428 (or 11526422 counting only the distinct ones).

The product of its digits is 162, while the sum is 18.

The square root of 311213313 is about 17641.2389871007. The cubic root of 311213313 is about 677.6717613919.

Adding to 311213313 its reverse (313312113), we get a palindrome (624525426).

The spelling of 311213313 in words is "three hundred eleven million, two hundred thirteen thousand, three hundred thirteen".