313202261 has 2 divisors, whose sum is σ = 313202262. Its totient is φ = 313202260.

The previous prime is 313202249. The next prime is 313202311. The reversal of 313202261 is 162202313.

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., 252206161 + 60996100 = 15881^2 + 7810^2 .

It is a cyclic number.

It is not a de Polignac number, because 313202261 - 2¹⁰ = 313201237 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (313202221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156601130 + 156601131.

It is an arithmetic number, because the mean of its divisors is an integer number (156601131).

Almost surely, 2^313202261 is an apocalyptic number.

It is an amenable number.

313202261 is a deficient number, since it is larger than the sum of its proper divisors (1).

313202261 is an equidigital number, since it uses as much as digits as its factorization.

313202261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 313202261 is about 17697.5213236204. The cubic root of 313202261 is about 679.1123517472.

Adding to 313202261 its reverse (162202313), we get a palindrome (475404574).

The spelling of 313202261 in words is "three hundred thirteen million, two hundred two thousand, two hundred sixty-one".