13228236391 has 2 divisors, whose sum is σ = 13228236392. Its totient is φ = 13228236390.

The previous prime is 13228236389. The next prime is 13228236421. The reversal of 13228236391 is 19363282231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13228236391 - 2¹ = 13228236389 is a prime.

Together with 13228236389, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13228236311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6614118195 + 6614118196.

It is an arithmetic number, because the mean of its divisors is an integer number (6614118196).

Almost surely, 2^13228236391 is an apocalyptic number.

13228236391 is a deficient number, since it is larger than the sum of its proper divisors (1).

13228236391 is an equidigital number, since it uses as much as digits as its factorization.

13228236391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 40.

The spelling of 13228236391 in words is "thirteen billion, two hundred twenty-eight million, two hundred thirty-six thousand, three hundred ninety-one".