15072313 has 2 divisors, whose sum is σ = 15072314. Its totient is φ = 15072312.

The previous prime is 15072311. The next prime is 15072349. The reversal of 15072313 is 31327051.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14961424 + 110889 = 3868^2 + 333^2 .

It is a cyclic number.

It is not a de Polignac number, because 15072313 - 2¹ = 15072311 is a prime.

Together with 15072311, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (15072311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7536156 + 7536157.

It is an arithmetic number, because the mean of its divisors is an integer number (7536157).

Almost surely, 2^15072313 is an apocalyptic number.

It is an amenable number.

15072313 is a deficient number, since it is larger than the sum of its proper divisors (1).

15072313 is an equidigital number, since it uses as much as digits as its factorization.

15072313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 630, while the sum is 22.

The square root of 15072313 is about 3882.3076900215. The cubic root of 15072313 is about 247.0168816012.

Adding to 15072313 its reverse (31327051), we get a palindrome (46399364).

The spelling of 15072313 in words is "fifteen million, seventy-two thousand, three hundred thirteen".