13312228 has 12 divisors (see below), whose sum is σ = 23399740. Its totient is φ = 6626592.

The previous prime is 13312199. The next prime is 13312231. The reversal of 13312228 is 82221331.

It can be written as a sum of positive squares in 2 ways, for example, as 10381284 + 2930944 = 3222^2 + 1712^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13312199 and 13312208.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6351 + ... + 8182.

Almost surely, 2^13312228 is an apocalyptic number.

It is an amenable number.

13312228 is a deficient number, since it is larger than the sum of its proper divisors (10087512).

13312228 is a wasteful number, since it uses less digits than its factorization.

13312228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14766 (or 14764 counting only the distinct ones).

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

The square root of 13312228 is about 3648.5926053754. The cubic root of 13312228 is about 237.0010385280.

Adding to 13312228 its reverse (82221331), we get a palindrome (95533559).

The spelling of 13312228 in words is "thirteen million, three hundred twelve thousand, two hundred twenty-eight".