13881571 has 16 divisors (see below), whose sum is σ = 16882560. Its totient is φ = 11249280.

The previous prime is 13881563. The next prime is 13881589. The reversal of 13881571 is 17518831.

It is a cyclic number.

It is not a de Polignac number, because 13881571 - 2³ = 13881563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13881551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1600 + ... + 5506.

It is an arithmetic number, because the mean of its divisors is an integer number (1055160).

Almost surely, 2^13881571 is an apocalyptic number.

13881571 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13881571 is a deficient number, since it is larger than the sum of its proper divisors (3000989).

13881571 is a wasteful number, since it uses less digits than its factorization.

13881571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3954.

The product of its digits is 6720, while the sum is 34.

The square root of 13881571 is about 3725.7980353208. The cubic root of 13881571 is about 240.3327040795.

The spelling of 13881571 in words is "thirteen million, eight hundred eighty-one thousand, five hundred seventy-one".