13155215 has 4 divisors (see below), whose sum is σ = 15786264. Its totient is φ = 10524168.

The previous prime is 13155209. The next prime is 13155221. The reversal of 13155215 is 51255131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51255131 = 1097 ⋅46723.

It is an interprime number because it is at equal distance from previous prime (13155209) and next prime (13155221).

It is a cyclic number.

It is not a de Polignac number, because 13155215 - 2¹⁰ = 13154191 is a prime.

It is a Duffinian number.

It is a congruent 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, 1315517 + ... + 1315526.

It is an arithmetic number, because the mean of its divisors is an integer number (3946566).

Almost surely, 2^13155215 is an apocalyptic number.

13155215 is a deficient number, since it is larger than the sum of its proper divisors (2631049).

13155215 is an equidigital number, since it uses as much as digits as its factorization.

13155215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2631048.

The product of its digits is 750, while the sum is 23.

The square root of 13155215 is about 3627.0118555086. The cubic root of 13155215 is about 236.0655699735.

The spelling of 13155215 in words is "thirteen million, one hundred fifty-five thousand, two hundred fifteen".