311013133 has 2 divisors, whose sum is σ = 311013134. Its totient is φ = 311013132.

The previous prime is 311013103. The next prime is 311013149. The reversal of 311013133 is 331310113.

It is an a-pointer prime, because the next prime (311013149) can be obtained adding 311013133 to its sum of digits (16).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 295943209 + 15069924 = 17203^2 + 3882^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311013133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311013103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155506566 + 155506567.

It is an arithmetic number, because the mean of its divisors is an integer number (155506567).

Almost surely, 2^311013133 is an apocalyptic number.

It is an amenable number.

311013133 is a deficient number, since it is larger than the sum of its proper divisors (1).

311013133 is an equidigital number, since it uses as much as digits as its factorization.

311013133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81, while the sum is 16.

The square root of 311013133 is about 17635.5644366717. The cubic root of 311013133 is about 677.5264318877.

Adding to 311013133 its reverse (331310113), we get a palindrome (642323246).

The spelling of 311013133 in words is "three hundred eleven million, thirteen thousand, one hundred thirty-three".