13813881 has 8 divisors (see below), whose sum is σ = 18458880. Its totient is φ = 9189072.

The previous prime is 13813873. The next prime is 13813883. The reversal of 13813881 is 18831831.

13813881 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 a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13813881 - 2³ = 13813873 is a prime.

It is a super-2 number, since 2×13813881² = 381646616564322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13813883) 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, 3370 + ... + 6243.

It is an arithmetic number, because the mean of its divisors is an integer number (2307360).

Almost surely, 2^13813881 is an apocalyptic number.

It is an amenable number.

13813881 is a deficient number, since it is larger than the sum of its proper divisors (4644999).

13813881 is an equidigital number, since it uses as much as digits as its factorization.

13813881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10095.

The product of its digits is 4608, while the sum is 33.

The square root of 13813881 is about 3716.7029744116. The cubic root of 13813881 is about 239.9414266782.

The spelling of 13813881 in words is "thirteen million, eight hundred thirteen thousand, eight hundred eighty-one".