313112161 has 2 divisors, whose sum is σ = 313112162. Its totient is φ = 313112160.

The previous prime is 313112147. The next prime is 313112249. The reversal of 313112161 is 161211313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 259822161 + 53290000 = 16119^2 + 7300^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-313112161 is a prime.

It is not a weakly prime, because it can be changed into another prime (313112131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156556080 + 156556081.

It is an arithmetic number, because the mean of its divisors is an integer number (156556081).

Almost surely, 2^313112161 is an apocalyptic number.

It is an amenable number.

313112161 is a deficient number, since it is larger than the sum of its proper divisors (1).

313112161 is an equidigital number, since it uses as much as digits as its factorization.

313112161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108, while the sum is 19.

The square root of 313112161 is about 17694.9755863070. The cubic root of 313112161 is about 679.0472246192.

Adding to 313112161 its reverse (161211313), we get a palindrome (474323474).

The spelling of 313112161 in words is "three hundred thirteen million, one hundred twelve thousand, one hundred sixty-one".