313021133 has 2 divisors, whose sum is σ = 313021134. Its totient is φ = 313021132.

The previous prime is 313021129. The next prime is 313021139. The reversal of 313021133 is 331120313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 245172964 + 67848169 = 15658^2 + 8237^2 .

It is an emirp because it is prime and its reverse (331120313) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 313021133 - 2² = 313021129 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (313021139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156510566 + 156510567.

It is an arithmetic number, because the mean of its divisors is an integer number (156510567).

Almost surely, 2^313021133 is an apocalyptic number.

It is an amenable number.

313021133 is a deficient number, since it is larger than the sum of its proper divisors (1).

313021133 is an equidigital number, since it uses as much as digits as its factorization.

313021133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 17.

The square root of 313021133 is about 17692.4032567653. The cubic root of 313021133 is about 678.9814140148.

Adding to 313021133 its reverse (331120313), we get a palindrome (644141446).

The spelling of 313021133 in words is "three hundred thirteen million, twenty-one thousand, one hundred thirty-three".