13881081 has 8 divisors (see below), whose sum is σ = 18592000. Its totient is φ = 9212112.

The previous prime is 13881079. The next prime is 13881089. The reversal of 13881081 is 18018831.

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

It is not a de Polignac number, because 13881081 - 2¹ = 13881079 is a prime.

It is a super-2 number, since 2×13881081² = 385368819457122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13881089) 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, 9706 + ... + 11043.

It is an arithmetic number, because the mean of its divisors is an integer number (2324000).

Almost surely, 2^13881081 is an apocalyptic number.

It is an amenable number.

13881081 is a deficient number, since it is larger than the sum of its proper divisors (4710919).

13881081 is a wasteful number, since it uses less digits than its factorization.

13881081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20975.

The product of its (nonzero) digits is 1536, while the sum is 30.

The square root of 13881081 is about 3725.7322770162. The cubic root of 13881081 is about 240.3298762436.

The spelling of 13881081 in words is "thirteen million, eight hundred eighty-one thousand, eighty-one".