15317213 has 2 divisors, whose sum is σ = 15317214. Its totient is φ = 15317212.

The previous prime is 15317207. The next prime is 15317219. The reversal of 15317213 is 31271351.

It is a balanced prime because it is at equal distance from previous prime (15317207) and next prime (15317219).

It can be written as a sum of positive squares in only one way, i.e., 14122564 + 1194649 = 3758^2 + 1093^2 .

It is a cyclic number.

It is not a de Polignac number, because 15317213 - 2¹⁴ = 15300829 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15317219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7658606 + 7658607.

It is an arithmetic number, because the mean of its divisors is an integer number (7658607).

Almost surely, 2^15317213 is an apocalyptic number.

It is an amenable number.

15317213 is a deficient number, since it is larger than the sum of its proper divisors (1).

15317213 is an equidigital number, since it uses as much as digits as its factorization.

15317213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 630, while the sum is 23.

The square root of 15317213 is about 3913.7211193441. The cubic root of 15317213 is about 248.3475713150.

Adding to 15317213 its reverse (31271351), we get a palindrome (46588564).

The spelling of 15317213 in words is "fifteen million, three hundred seventeen thousand, two hundred thirteen".