15313313 has 2 divisors, whose sum is σ = 15313314. Its totient is φ = 15313312.

The previous prime is 15313307. The next prime is 15313321. The reversal of 15313313 is 31331351.

15313313 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15147664 + 165649 = 3892^2 + 407^2 .

It is an emirp because it is prime and its reverse (31331351) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15313313 - 2⁸ = 15313057 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (15313303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7656656 + 7656657.

It is an arithmetic number, because the mean of its divisors is an integer number (7656657).

Almost surely, 2^15313313 is an apocalyptic number.

It is an amenable number.

15313313 is a deficient number, since it is larger than the sum of its proper divisors (1).

15313313 is an equidigital number, since it uses as much as digits as its factorization.

15313313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 405, while the sum is 20.

The square root of 15313313 is about 3913.2228405753. Note that the first 3 decimals coincide. The cubic root of 15313313 is about 248.3264918114.

Adding to 15313313 its reverse (31331351), we get a palindrome (46644664).

The spelling of 15313313 in words is "fifteen million, three hundred thirteen thousand, three hundred thirteen".