13213228 has 12 divisors (see below), whose sum is σ = 26426512. Its totient is φ = 5662800.

The previous prime is 13213159. The next prime is 13213229. The reversal of 13213228 is 82231231.

13213228 is digitally balanced in base 2 and base 8, because in such bases it contains all the possibile digits an equal number of times.

13213228 is an admirable number.

13213228 is strictly pandigital in base 8.

It is a junction number, because it is equal to n+sod(n) for n = 13213199 and 13213208.

It is not an unprimeable number, because it can be changed into a prime (13213229) 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, 235923 + ... + 235978.

Almost surely, 2^13213228 is an apocalyptic number.

It is an amenable number.

13213228 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13213228 is a wasteful number, since it uses less digits than its factorization.

13213228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471912 (or 471910 counting only the distinct ones).

The product of its digits is 576, while the sum is 22.

The square root of 13213228 is about 3635.0004126547. Note that the first 3 decimals coincide. The cubic root of 13213228 is about 236.4120685584.

Adding to 13213228 its reverse (82231231), we get a palindrome (95444459).

The spelling of 13213228 in words is "thirteen million, two hundred thirteen thousand, two hundred twenty-eight".