13291881 has 8 divisors (see below), whose sum is σ = 17816064. Its totient is φ = 8814480.

The previous prime is 13291871. The next prime is 13291891. The reversal of 13291881 is 18819231.

13291881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (13291871) and next prime (13291891).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13291881 - 2⁷ = 13291753 is a prime.

It is a super-2 number, since 2×13291881² = 353348201036322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13291871) 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, 11026 + ... + 12171.

It is an arithmetic number, because the mean of its divisors is an integer number (2227008).

Almost surely, 2^13291881 is an apocalyptic number.

It is an amenable number.

13291881 is a deficient number, since it is larger than the sum of its proper divisors (4524183).

13291881 is a wasteful number, since it uses less digits than its factorization.

13291881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23391.

The product of its digits is 3456, while the sum is 33.

The square root of 13291881 is about 3645.8032036850. The cubic root of 13291881 is about 236.8802293223.

The spelling of 13291881 in words is "thirteen million, two hundred ninety-one thousand, eight hundred eighty-one".