13131226 has 16 divisors (see below), whose sum is σ = 20567880. Its totient is φ = 6281280.

The previous prime is 13131203. The next prime is 13131233. The reversal of 13131226 is 62213131.

It can be written as a sum of positive squares in 4 ways, for example, as 12257001 + 874225 = 3501^2 + 935^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3060 + ... + 5968.

Almost surely, 2^13131226 is an apocalyptic number.

13131226 is a deficient number, since it is larger than the sum of its proper divisors (7436654).

13131226 is a wasteful number, since it uses less digits than its factorization.

13131226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3009.

The product of its digits is 216, while the sum is 19.

The square root of 13131226 is about 3623.7033543048. The cubic root of 13131226 is about 235.9219913581.

Adding to 13131226 its reverse (62213131), we get a palindrome (75344357).

The spelling of 13131226 in words is "thirteen million, one hundred thirty-one thousand, two hundred twenty-six".