13226520 has 32 divisors (see below), whose sum is σ = 39679920. Its totient is φ = 3527040.

The previous prime is 13226513. The next prime is 13226531. The reversal of 13226520 is 2562231.

It is a Smith number, since the sum of its digits (21) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54991 + ... + 55230.

Almost surely, 2^13226520 is an apocalyptic number.

13226520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13226520 is an abundant number, since it is smaller than the sum of its proper divisors (26453400).

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

13226520 is a wasteful number, since it uses less digits than its factorization.

13226520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110235 (or 110231 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 13226520 is about 3636.8282884953. The cubic root of 13226520 is about 236.4913158121.

Adding to 13226520 its reverse (2562231), we get a palindrome (15788751).

The spelling of 13226520 in words is "thirteen million, two hundred twenty-six thousand, five hundred twenty".