13215264399 has 32 divisors (see below), whose sum is σ = 20675612160. Its totient is φ = 8325561024.

The previous prime is 13215264397. The next prime is 13215264401. The reversal of 13215264399 is 99346251231.

13215264399 is a `hidden beast` number, since 1 + 32 + 1 + 526 + 4 + 3 + 99 = 666.

It is an interprime number because it is at equal distance from previous prime (13215264397) and next prime (13215264401).

It is not a de Polignac number, because 13215264399 - 2¹ = 13215264397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13215264397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 76654 + ... + 179739.

It is an arithmetic number, because the mean of its divisors is an integer number (646112880).

Almost surely, 2^13215264399 is an apocalyptic number.

13215264399 is a deficient number, since it is larger than the sum of its proper divisors (7460347761).

13215264399 is a wasteful number, since it uses less digits than its factorization.

13215264399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256508 (or 256502 counting only the distinct ones).

The product of its digits is 349920, while the sum is 45.

The spelling of 13215264399 in words is "thirteen billion, two hundred fifteen million, two hundred sixty-four thousand, three hundred ninety-nine".