13155715 has 4 divisors (see below), whose sum is σ = 15786864. Its totient is φ = 10524568.

The previous prime is 13155707. The next prime is 13155743. The reversal of 13155715 is 51755131.

13155715 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13155715 - 2³ = 13155707 is a prime.

It is a super-2 number, since 2×13155715² = 346145674322450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1315567 + ... + 1315576.

It is an arithmetic number, because the mean of its divisors is an integer number (3946716).

Almost surely, 2^13155715 is an apocalyptic number.

13155715 is a deficient number, since it is larger than the sum of its proper divisors (2631149).

13155715 is an equidigital number, since it uses as much as digits as its factorization.

13155715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2631148.

The product of its digits is 2625, while the sum is 28.

The square root of 13155715 is about 3627.0807821167. The cubic root of 13155715 is about 236.0685607086.

The spelling of 13155715 in words is "thirteen million, one hundred fifty-five thousand, seven hundred fifteen".