13228911 has 6 divisors (see below), whose sum is σ = 19108440. Its totient is φ = 8819268.

The previous prime is 13228903. The next prime is 13228913. The reversal of 13228911 is 11982231.

It is not a de Polignac number, because 13228911 - 2³ = 13228903 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13228913) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 734931 + ... + 734948.

It is an arithmetic number, because the mean of its divisors is an integer number (3184740).

Almost surely, 2^13228911 is an apocalyptic number.

13228911 is a deficient number, since it is larger than the sum of its proper divisors (5879529).

13228911 is a wasteful number, since it uses less digits than its factorization.

13228911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1469885 (or 1469882 counting only the distinct ones).

The product of its digits is 864, while the sum is 27.

The square root of 13228911 is about 3637.1569941370. The cubic root of 13228911 is about 236.5055653821.

The spelling of 13228911 in words is "thirteen million, two hundred twenty-eight thousand, nine hundred eleven".