13226631 has 24 divisors (see below), whose sum is σ = 19662720. Its totient is φ = 7901520.

The previous prime is 13226623. The next prime is 13226683. The reversal of 13226631 is 13662231.

It is a happy number.

13226631 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13226631 - 2³ = 13226623 is a prime.

It is a super-2 number, since 2×13226631² = 349887535220322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13226611) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29910 + ... + 30348.

It is an arithmetic number, because the mean of its divisors is an integer number (819280).

Almost surely, 2^13226631 is an apocalyptic number.

13226631 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13226631 is a deficient number, since it is larger than the sum of its proper divisors (6436089).

13226631 is a wasteful number, since it uses less digits than its factorization.

13226631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547 (or 536 counting only the distinct ones).

The product of its digits is 1296, while the sum is 24.

The square root of 13226631 is about 3636.8435490133. The cubic root of 13226631 is about 236.4919773734.

Adding to 13226631 its reverse (13662231), we get a palindrome (26888862).

Subtracting 13226631 from its reverse (13662231), we obtain a square (435600 = 660²).

The spelling of 13226631 in words is "thirteen million, two hundred twenty-six thousand, six hundred thirty-one".