311213113 has 2 divisors, whose sum is σ = 311213114. Its totient is φ = 311213112.

The previous prime is 311213107. The next prime is 311213117. The reversal of 311213113 is 311312113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 193989184 + 117223929 = 13928^2 + 10827^2 .

It is a cyclic number.

It is not a de Polignac number, because 311213113 - 2⁵ = 311213081 is a prime.

It is not a weakly prime, because it can be changed into another prime (311213117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155606556 + 155606557.

It is an arithmetic number, because the mean of its divisors is an integer number (155606557).

Almost surely, 2^311213113 is an apocalyptic number.

It is an amenable number.

311213113 is a deficient number, since it is larger than the sum of its proper divisors (1).

311213113 is an equidigital number, since it uses as much as digits as its factorization.

311213113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54, while the sum is 16.

The square root of 311213113 is about 17641.2333185636. The cubic root of 311213113 is about 677.6716162242.

Adding to 311213113 its reverse (311312113), we get a palindrome (622525226).

The spelling of 311213113 in words is "three hundred eleven million, two hundred thirteen thousand, one hundred thirteen".