15117313 has 2 divisors, whose sum is σ = 15117314. Its totient is φ = 15117312.

The previous prime is 15117307. The next prime is 15117337. The reversal of 15117313 is 31371151.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8105409 + 7011904 = 2847^2 + 2648^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15117313 is a prime.

It is not a weakly prime, because it can be changed into another prime (15117343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7558656 + 7558657.

It is an arithmetic number, because the mean of its divisors is an integer number (7558657).

Almost surely, 2^15117313 is an apocalyptic number.

It is an amenable number.

15117313 is a deficient number, since it is larger than the sum of its proper divisors (1).

15117313 is an equidigital number, since it uses as much as digits as its factorization.

15117313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 315, while the sum is 22.

The square root of 15117313 is about 3888.0988927752. The cubic root of 15117313 is about 247.2624691133.

Adding to 15117313 its reverse (31371151), we get a palindrome (46488464).

The spelling of 15117313 in words is "fifteen million, one hundred seventeen thousand, three hundred thirteen".