1313552257 has 2 divisors, whose sum is σ = 1313552258. Its totient is φ = 1313552256.

The previous prime is 1313552239. The next prime is 1313552309. The reversal of 1313552257 is 7522553131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1129027201 + 184525056 = 33601^2 + 13584^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1313552257 is a prime.

It is not a weakly prime, because it can be changed into another prime (1313552557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656776128 + 656776129.

It is an arithmetic number, because the mean of its divisors is an integer number (656776129).

Almost surely, 2^1313552257 is an apocalyptic number.

It is an amenable number.

1313552257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313552257 is an equidigital number, since it uses as much as digits as its factorization.

1313552257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31500, while the sum is 34.

The square root of 1313552257 is about 36242.9614821968. The cubic root of 1313552257 is about 1095.1723023483.

The spelling of 1313552257 in words is "one billion, three hundred thirteen million, five hundred fifty-two thousand, two hundred fifty-seven".