311201249 has 2 divisors, whose sum is σ = 311201250. Its totient is φ = 311201248.

The previous prime is 311201237. The next prime is 311201299. The reversal of 311201249 is 942102113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 257281600 + 53919649 = 16040^2 + 7343^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311201249 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (311201299) 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, 155600624 + 155600625.

It is an arithmetic number, because the mean of its divisors is an integer number (155600625).

Almost surely, 2^311201249 is an apocalyptic number.

It is an amenable number.

311201249 is a deficient number, since it is larger than the sum of its proper divisors (1).

311201249 is an equidigital number, since it uses as much as digits as its factorization.

311201249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 311201249 is about 17640.8970576896. The cubic root of 311201249 is about 677.6630047637.

The spelling of 311201249 in words is "three hundred eleven million, two hundred one thousand, two hundred forty-nine".