313195261 has 2 divisors, whose sum is σ = 313195262. Its totient is φ = 313195260.

The previous prime is 313195247. The next prime is 313195277. The reversal of 313195261 is 162591313.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 298218361 + 14976900 = 17269^2 + 3870^2 .

It is a cyclic number.

It is not a de Polignac number, because 313195261 - 2⁷ = 313195133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (313195661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156597630 + 156597631.

It is an arithmetic number, because the mean of its divisors is an integer number (156597631).

Almost surely, 2^313195261 is an apocalyptic number.

It is an amenable number.

313195261 is a deficient number, since it is larger than the sum of its proper divisors (1).

313195261 is an equidigital number, since it uses as much as digits as its factorization.

313195261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4860, while the sum is 31.

The square root of 313195261 is about 17697.3235547074. The cubic root of 313195261 is about 679.1072923735.

The spelling of 313195261 in words is "three hundred thirteen million, one hundred ninety-five thousand, two hundred sixty-one".