13217232355 has 4 divisors (see below), whose sum is σ = 15860678832. Its totient is φ = 10573785880.

The previous prime is 13217232341. The next prime is 13217232359. The reversal of 13217232355 is 55323271231.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 13217232355 - 2⁹ = 13217231843 is a prime.

It is a super-2 number, since 2×13217232355² (a number of 21 digits) contains 22 as substring.

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 13217232355.

It is not an unprimeable number, because it can be changed into a prime (13217232359) 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, 1321723231 + ... + 1321723240.

It is an arithmetic number, because the mean of its divisors is an integer number (3965169708).

Almost surely, 2^13217232355 is an apocalyptic number.

13217232355 is a deficient number, since it is larger than the sum of its proper divisors (2643446477).

13217232355 is an equidigital number, since it uses as much as digits as its factorization.

13217232355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2643446476.

The product of its digits is 37800, while the sum is 34.

The spelling of 13217232355 in words is "thirteen billion, two hundred seventeen million, two hundred thirty-two thousand, three hundred fifty-five".