13223815856 has 10 divisors (see below), whose sum is σ = 25621143252. Its totient is φ = 6611907920.

The previous prime is 13223815849. The next prime is 13223815859. The reversal of 13223815856 is 65851832231.

It is not an unprimeable number, because it can be changed into a prime (13223815859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 413244230 + ... + 413244261.

Almost surely, 2^13223815856 is an apocalyptic number.

13223815856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13223815856 is a deficient number, since it is larger than the sum of its proper divisors (12397327396).

13223815856 is an equidigital number, since it uses as much as digits as its factorization.

13223815856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 826488499 (or 826488493 counting only the distinct ones).

The product of its digits is 345600, while the sum is 44.

The spelling of 13223815856 in words is "thirteen billion, two hundred twenty-three million, eight hundred fifteen thousand, eight hundred fifty-six".