313271561 has 2 divisors, whose sum is σ = 313271562. Its totient is φ = 313271560.

The previous prime is 313271551. The next prime is 313271579. The reversal of 313271561 is 165172313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 202179961 + 111091600 = 14219^2 + 10540^2 .

It is a cyclic number.

It is not a de Polignac number, because 313271561 - 2²² = 309077257 is a prime.

It is not a weakly prime, because it can be changed into another prime (313271501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156635780 + 156635781.

It is an arithmetic number, because the mean of its divisors is an integer number (156635781).

Almost surely, 2^313271561 is an apocalyptic number.

It is an amenable number.

313271561 is a deficient number, since it is larger than the sum of its proper divisors (1).

313271561 is an equidigital number, since it uses as much as digits as its factorization.

313271561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3780, while the sum is 29.

The square root of 313271561 is about 17699.4791166294. The cubic root of 313271561 is about 679.1624354803.

The spelling of 313271561 in words is "three hundred thirteen million, two hundred seventy-one thousand, five hundred sixty-one".