313656656281 has 2 divisors, whose sum is σ = 313656656282. Its totient is φ = 313656656280.

The previous prime is 313656656239. The next prime is 313656656329. The reversal of 313656656281 is 182656656313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 305570150656 + 8086505625 = 552784^2 + 89925^2 .

It is a cyclic number.

It is not a de Polignac number, because 313656656281 - 2⁷ = 313656656153 is a prime.

It is a super-2 number, since 2×313656656281² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (313656656081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156828328140 + 156828328141.

It is an arithmetic number, because the mean of its divisors is an integer number (156828328141).

Almost surely, 2^313656656281 is an apocalyptic number.

It is an amenable number.

313656656281 is a deficient number, since it is larger than the sum of its proper divisors (1).

313656656281 is an equidigital number, since it uses as much as digits as its factorization.

313656656281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4665600, while the sum is 52.

The spelling of 313656656281 in words is "three hundred thirteen billion, six hundred fifty-six million, six hundred fifty-six thousand, two hundred eighty-one".