13213885 has 4 divisors (see below), whose sum is σ = 15856668. Its totient is φ = 10571104.

The previous prime is 13213867. The next prime is 13213901. The reversal of 13213885 is 58831231.

13213885 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 can be written as a sum of positive squares in 2 ways, for example, as 2735716 + 10478169 = 1654^2 + 3237^2 .

It is a cyclic number.

It is not a de Polignac number, because 13213885 - 2⁵ = 13213853 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, 1321384 + ... + 1321393.

It is an arithmetic number, because the mean of its divisors is an integer number (3964167).

Almost surely, 2^13213885 is an apocalyptic number.

It is an amenable number.

13213885 is a deficient number, since it is larger than the sum of its proper divisors (2642783).

13213885 is an equidigital number, since it uses as much as digits as its factorization.

13213885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2642782.

The product of its digits is 5760, while the sum is 31.

The square root of 13213885 is about 3635.0907829104. The cubic root of 13213885 is about 236.4159868579.

The spelling of 13213885 in words is "thirteen million, two hundred thirteen thousand, eight hundred eighty-five".