13215889 has 4 divisors (see below), whose sum is σ = 13642240. Its totient is φ = 12789540.

The previous prime is 13215871. The next prime is 13215893. The reversal of 13215889 is 98851231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13215889 - 2¹¹ = 13213841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13215809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213129 + ... + 213190.

It is an arithmetic number, because the mean of its divisors is an integer number (3410560).

Almost surely, 2^13215889 is an apocalyptic number.

It is an amenable number.

13215889 is a deficient number, since it is larger than the sum of its proper divisors (426351).

13215889 is an equidigital number, since it uses as much as digits as its factorization.

13215889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426350.

The product of its digits is 17280, while the sum is 37.

The square root of 13215889 is about 3635.3664189460. The cubic root of 13215889 is about 236.4279377638.

The spelling of 13215889 in words is "thirteen million, two hundred fifteen thousand, eight hundred eighty-nine".