13215985 has 8 divisors (see below), whose sum is σ = 15935616. Its totient is φ = 10521840.

The previous prime is 13215949. The next prime is 13215991. The reversal of 13215985 is 58951231.

13215985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13215985 - 2⁹ = 13215473 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13215985.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5209 + ... + 7318.

It is an arithmetic number, because the mean of its divisors is an integer number (1991952).

Almost surely, 2^13215985 is an apocalyptic number.

It is an amenable number.

13215985 is a deficient number, since it is larger than the sum of its proper divisors (2719631).

13215985 is a wasteful number, since it uses less digits than its factorization.

13215985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12743.

The product of its digits is 10800, while the sum is 34.

The square root of 13215985 is about 3635.3796225429. The cubic root of 13215985 is about 236.4285102319.

The spelling of 13215985 in words is "thirteen million, two hundred fifteen thousand, nine hundred eighty-five".