311253149 has 2 divisors, whose sum is σ = 311253150. Its totient is φ = 311253148.

The previous prime is 311253133. The next prime is 311253157. The reversal of 311253149 is 941352113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 177688900 + 133564249 = 13330^2 + 11557^2 .

It is a cyclic number.

It is not a de Polignac number, because 311253149 - 2⁴ = 311253133 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311253169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155626574 + 155626575.

It is an arithmetic number, because the mean of its divisors is an integer number (155626575).

Almost surely, 2^311253149 is an apocalyptic number.

It is an amenable number.

311253149 is a deficient number, since it is larger than the sum of its proper divisors (1).

311253149 is an equidigital number, since it uses as much as digits as its factorization.

311253149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3240, while the sum is 29.

The square root of 311253149 is about 17642.3680099923. The cubic root of 311253149 is about 677.7006746586.

The spelling of 311253149 in words is "three hundred eleven million, two hundred fifty-three thousand, one hundred forty-nine".