311625338249 has 2 divisors, whose sum is σ = 311625338250. Its totient is φ = 311625338248.

The previous prime is 311625338197. The next prime is 311625338279. The reversal of 311625338249 is 942833526113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 278750209024 + 32875129225 = 527968^2 + 181315^2 .

It is an emirp because it is prime and its reverse (942833526113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 311625338249 - 2⁸ = 311625337993 is a prime.

It is a super-2 number, since 2×311625338249² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (311625338279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155812669124 + 155812669125.

It is an arithmetic number, because the mean of its divisors is an integer number (155812669125).

Almost surely, 2^311625338249 is an apocalyptic number.

It is an amenable number.

311625338249 is a deficient number, since it is larger than the sum of its proper divisors (1).

311625338249 is an equidigital number, since it uses as much as digits as its factorization.

311625338249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 933120, while the sum is 47.

The spelling of 311625338249 in words is "three hundred eleven billion, six hundred twenty-five million, three hundred thirty-eight thousand, two hundred forty-nine".