310939961257 has 2 divisors, whose sum is σ = 310939961258. Its totient is φ = 310939961256.

The previous prime is 310939961239. The next prime is 310939961291. The reversal of 310939961257 is 752169939013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 280530181801 + 30409779456 = 529651^2 + 174384^2 .

It is a cyclic number.

It is not a de Polignac number, because 310939961257 - 2²⁷ = 310805743529 is a prime.

It is a super-2 number, since 2×310939961257² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 310939961198 and 310939961207.

It is not a weakly prime, because it can be changed into another prime (310939961957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155469980628 + 155469980629.

It is an arithmetic number, because the mean of its divisors is an integer number (155469980629).

Almost surely, 2^310939961257 is an apocalyptic number.

It is an amenable number.

310939961257 is a deficient number, since it is larger than the sum of its proper divisors (1).

310939961257 is an equidigital number, since it uses as much as digits as its factorization.

310939961257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2755620, while the sum is 55.

The spelling of 310939961257 in words is "three hundred ten billion, nine hundred thirty-nine million, nine hundred sixty-one thousand, two hundred fifty-seven".