13215897 has 12 divisors (see below), whose sum is σ = 19122480. Its totient is φ = 8795448.

The previous prime is 13215893. The next prime is 13215901. The reversal of 13215897 is 79851231.

It is an interprime number because it is at equal distance from previous prime (13215893) and next prime (13215901).

It is not a de Polignac number, because 13215897 - 2² = 13215893 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (13215893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7354 + ... + 8972.

It is an arithmetic number, because the mean of its divisors is an integer number (1593540).

Almost surely, 2^13215897 is an apocalyptic number.

It is an amenable number.

13215897 is a deficient number, since it is larger than the sum of its proper divisors (5906583).

13215897 is a wasteful number, since it uses less digits than its factorization.

13215897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2532 (or 2529 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 13215897 is about 3635.3675192475. The cubic root of 13215897 is about 236.4279854696.

The spelling of 13215897 in words is "thirteen million, two hundred fifteen thousand, eight hundred ninety-seven".