15155513 has 2 divisors, whose sum is σ = 15155514. Its totient is φ = 15155512.

The previous prime is 15155489. The next prime is 15155531. The reversal of 15155513 is 31555151.

15155513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with next prime (15155531) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15155449 + 64 = 3893^2 + 8^2 .

It is a cyclic number.

It is not a de Polignac number, because 15155513 - 2¹⁸ = 14893369 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (15155563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7577756 + 7577757.

It is an arithmetic number, because the mean of its divisors is an integer number (7577757).

Almost surely, 2^15155513 is an apocalyptic number.

It is an amenable number.

15155513 is a deficient number, since it is larger than the sum of its proper divisors (1).

15155513 is an equidigital number, since it uses as much as digits as its factorization.

15155513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1875, while the sum is 26.

The square root of 15155513 is about 3893.0082198732. The cubic root of 15155513 is about 247.4705634480.

The spelling of 15155513 in words is "fifteen million, one hundred fifty-five thousand, five hundred thirteen".