15215113 has 2 divisors, whose sum is σ = 15215114. Its totient is φ = 15215112.

The previous prime is 15215099. The next prime is 15215117. The reversal of 15215113 is 31151251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9659664 + 5555449 = 3108^2 + 2357^2 .

It is an emirp because it is prime and its reverse (31151251) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15215113 is a prime.

It is not a weakly prime, because it can be changed into another prime (15215117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7607556 + 7607557.

It is an arithmetic number, because the mean of its divisors is an integer number (7607557).

Almost surely, 2^15215113 is an apocalyptic number.

It is an amenable number.

15215113 is a deficient number, since it is larger than the sum of its proper divisors (1).

15215113 is an equidigital number, since it uses as much as digits as its factorization.

15215113 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 150, while the sum is 19.

The square root of 15215113 is about 3900.6554577404. The cubic root of 15215113 is about 247.7945369443.

Adding to 15215113 its reverse (31151251), we get a palindrome (46366364).

The spelling of 15215113 in words is "fifteen million, two hundred fifteen thousand, one hundred thirteen".