313455509281 has 2 divisors, whose sum is σ = 313455509282. Its totient is φ = 313455509280.

The previous prime is 313455509251. The next prime is 313455509299. The reversal of 313455509281 is 182905554313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 303508439056 + 9947070225 = 550916^2 + 99735^2 .

It is a cyclic number.

It is not a de Polignac number, because 313455509281 - 2¹⁷ = 313455378209 is a prime.

It is a super-2 number, since 2×313455509281² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (313455509231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156727754640 + 156727754641.

It is an arithmetic number, because the mean of its divisors is an integer number (156727754641).

Almost surely, 2^313455509281 is an apocalyptic number.

It is an amenable number.

313455509281 is a deficient number, since it is larger than the sum of its proper divisors (1).

313455509281 is an equidigital number, since it uses as much as digits as its factorization.

313455509281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648000, while the sum is 46.

The spelling of 313455509281 in words is "three hundred thirteen billion, four hundred fifty-five million, five hundred nine thousand, two hundred eighty-one".