13251109 has 4 divisors (see below), whose sum is σ = 14030604. Its totient is φ = 12471616.

The previous prime is 13251107. The next prime is 13251131. The reversal of 13251109 is 90115231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90115231 = 97 ⋅929023.

It can be written as a sum of positive squares in 2 ways, for example, as 6890625 + 6360484 = 2625^2 + 2522^2 .

It is a cyclic number.

It is not a de Polignac number, because 13251109 - 2¹ = 13251107 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13251109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13251101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 389722 + ... + 389755.

It is an arithmetic number, because the mean of its divisors is an integer number (3507651).

Almost surely, 2^13251109 is an apocalyptic number.

It is an amenable number.

13251109 is a deficient number, since it is larger than the sum of its proper divisors (779495).

13251109 is an equidigital number, since it uses as much as digits as its factorization.

13251109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 779494.

The product of its (nonzero) digits is 270, while the sum is 22.

The square root of 13251109 is about 3640.2072743183. The cubic root of 13251109 is about 236.6377762349.

The spelling of 13251109 in words is "thirteen million, two hundred fifty-one thousand, one hundred nine".