13731855 has 16 divisors (see below), whose sum is σ = 22070880. Its totient is φ = 7290368.

The previous prime is 13731829. The next prime is 13731863. The reversal of 13731855 is 55813731.

It is a cyclic number.

It is not a de Polignac number, because 13731855 - 2⁷ = 13731727 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1531 + ... + 5459.

It is an arithmetic number, because the mean of its divisors is an integer number (1379430).

Almost surely, 2^13731855 is an apocalyptic number.

13731855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13731855 is a deficient number, since it is larger than the sum of its proper divisors (8339025).

13731855 is a wasteful number, since it uses less digits than its factorization.

13731855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4170.

The product of its digits is 12600, while the sum is 33.

The square root of 13731855 is about 3705.6517645348. The cubic root of 13731855 is about 239.4655642658.

The spelling of 13731855 in words is "thirteen million, seven hundred thirty-one thousand, eight hundred fifty-five".