313566881 has 2 divisors, whose sum is σ = 313566882. Its totient is φ = 313566880.

The previous prime is 313566871. The next prime is 313566931. The reversal of 313566881 is 188665313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 313467025 + 99856 = 17705^2 + 316^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-313566881 is a prime.

It is a super-2 number, since 2×313566881² = 196648377720136322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (313566871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156783440 + 156783441.

It is an arithmetic number, because the mean of its divisors is an integer number (156783441).

Almost surely, 2^313566881 is an apocalyptic number.

It is an amenable number.

313566881 is a deficient number, since it is larger than the sum of its proper divisors (1).

313566881 is an equidigital number, since it uses as much as digits as its factorization.

313566881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 103680, while the sum is 41.

The square root of 313566881 is about 17707.8197698079. The cubic root of 313566881 is about 679.3757831343.

The spelling of 313566881 in words is "three hundred thirteen million, five hundred sixty-six thousand, eight hundred eighty-one".