13221857863 has 2 divisors, whose sum is σ = 13221857864. Its totient is φ = 13221857862.

The previous prime is 13221857851. The next prime is 13221857897. The reversal of 13221857863 is 36875812231.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13221857863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13221857063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6610928931 + 6610928932.

It is an arithmetic number, because the mean of its divisors is an integer number (6610928932).

Almost surely, 2^13221857863 is an apocalyptic number.

13221857863 is a deficient number, since it is larger than the sum of its proper divisors (1).

13221857863 is an equidigital number, since it uses as much as digits as its factorization.

13221857863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 483840, while the sum is 46.

The spelling of 13221857863 in words is "thirteen billion, two hundred twenty-one million, eight hundred fifty-seven thousand, eight hundred sixty-three".