313229881 has 2 divisors, whose sum is σ = 313229882. Its totient is φ = 313229880.

The previous prime is 313229863. The next prime is 313229897. The reversal of 313229881 is 188922313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 210714256 + 102515625 = 14516^2 + 10125^2 .

It is a cyclic number.

It is not a de Polignac number, because 313229881 - 2²⁷ = 179012153 is a prime.

It is a super-2 number, since 2×313229881² = 196225916702548322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 313229881.

It is not a weakly prime, because it can be changed into another prime (313229281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156614940 + 156614941.

It is an arithmetic number, because the mean of its divisors is an integer number (156614941).

Almost surely, 2^313229881 is an apocalyptic number.

It is an amenable number.

313229881 is a deficient number, since it is larger than the sum of its proper divisors (1).

313229881 is an equidigital number, since it uses as much as digits as its factorization.

313229881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 37.

The square root of 313229881 is about 17698.3016416830. The cubic root of 313229881 is about 679.1323138550.

The spelling of 313229881 in words is "three hundred thirteen million, two hundred twenty-nine thousand, eight hundred eighty-one".