133515313 has 2 divisors, whose sum is σ = 133515314. Its totient is φ = 133515312.

The previous prime is 133515259. The next prime is 133515323. The reversal of 133515313 is 313515331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84052224 + 49463089 = 9168^2 + 7033^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133515313 is a prime.

It is not a weakly prime, because it can be changed into another prime (133515323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66757656 + 66757657.

It is an arithmetic number, because the mean of its divisors is an integer number (66757657).

Almost surely, 2^133515313 is an apocalyptic number.

It is an amenable number.

133515313 is a deficient number, since it is larger than the sum of its proper divisors (1).

133515313 is an equidigital number, since it uses as much as digits as its factorization.

133515313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2025, while the sum is 25.

The square root of 133515313 is about 11554.8826476083. The cubic root of 133515313 is about 511.1052704944.

The spelling of 133515313 in words is "one hundred thirty-three million, five hundred fifteen thousand, three hundred thirteen".