13831538 has 16 divisors (see below), whose sum is σ = 23838720. Its totient is φ = 5895936.

The previous prime is 13831537. The next prime is 13831541. The reversal of 13831538 is 83513831.

13831538 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×13831538² = 382622886890888, which contains 22 as substring.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (13831537) 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, 143 + ... + 5261.

It is an arithmetic number, because the mean of its divisors is an integer number (1489920).

Almost surely, 2^13831538 is an apocalyptic number.

13831538 is a deficient number, since it is larger than the sum of its proper divisors (10007182).

13831538 is a wasteful number, since it uses less digits than its factorization.

13831538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5321.

The product of its digits is 8640, while the sum is 32.

The square root of 13831538 is about 3719.0775738078. The cubic root of 13831538 is about 240.0436147587.

The spelling of 13831538 in words is "thirteen million, eight hundred thirty-one thousand, five hundred thirty-eight".