13231104 has 88 divisors (see below), whose sum is σ = 36354720. Its totient is φ = 4276224.

The previous prime is 13231103. The next prime is 13231123. The reversal of 13231104 is 40113231.

It is a super-2 number, since 2×13231104² = 350124226117632, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13231103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181212 + ... + 181284.

Almost surely, 2^13231104 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13231104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18177360).

13231104 is an abundant number, since it is smaller than the sum of its proper divisors (23123616).

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

13231104 is an equidigital number, since it uses as much as digits as its factorization.

13231104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155 (or 137 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 13231104 is about 3637.4584533710. The cubic root of 13231104 is about 236.5186334280.

Adding to 13231104 its reverse (40113231), we get a palindrome (53344335).

The spelling of 13231104 in words is "thirteen million, two hundred thirty-one thousand, one hundred four".