13189815 has 12 divisors (see below), whose sum is σ = 22862424. Its totient is φ = 7034544.

The previous prime is 13189801. The next prime is 13189829. The reversal of 13189815 is 51898131.

13189815 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (13189801) and next prime (13189829).

It is not a de Polignac number, because 13189815 - 2⁸ = 13189559 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13189815.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 146509 + ... + 146598.

It is an arithmetic number, because the mean of its divisors is an integer number (1905202).

Almost surely, 2^13189815 is an apocalyptic number.

13189815 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13189815 is a deficient number, since it is larger than the sum of its proper divisors (9672609).

13189815 is a wasteful number, since it uses less digits than its factorization.

13189815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293118 (or 293115 counting only the distinct ones).

The product of its digits is 8640, while the sum is 36.

The square root of 13189815 is about 3631.7784899413. The cubic root of 13189815 is about 236.2723502832.

The spelling of 13189815 in words is "thirteen million, one hundred eighty-nine thousand, eight hundred fifteen".