313255955981 has 2 divisors, whose sum is σ = 313255955982. Its totient is φ = 313255955980.

The previous prime is 313255955959. The next prime is 313255956023. The reversal of 313255955981 is 189559552313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 299902997956 + 13352958025 = 547634^2 + 115555^2 .

It is a cyclic number.

It is not a de Polignac number, because 313255955981 - 2²² = 313251761677 is a prime.

It is a super-2 number, since 2×313255955981² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (313255955911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156627977990 + 156627977991.

It is an arithmetic number, because the mean of its divisors is an integer number (156627977991).

Almost surely, 2^313255955981 is an apocalyptic number.

It is an amenable number.

313255955981 is a deficient number, since it is larger than the sum of its proper divisors (1).

313255955981 is an equidigital number, since it uses as much as digits as its factorization.

313255955981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7290000, while the sum is 56.

The spelling of 313255955981 in words is "three hundred thirteen billion, two hundred fifty-five million, nine hundred fifty-five thousand, nine hundred eighty-one".