13831056 has 60 divisors (see below), whose sum is σ = 39042640. Its totient is φ = 4570560.

The previous prime is 13831049. The next prime is 13831067. The reversal of 13831056 is 65013831.

It is a super-2 number, since 2×13831056² = 382596220150272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19671 + ... + 20361.

Almost surely, 2^13831056 is an apocalyptic number.

13831056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13831056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19521320).

13831056 is an abundant number, since it is smaller than the sum of its proper divisors (25211584).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13831056 is a wasteful number, since it uses less digits than its factorization.

13831056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844 (or 835 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 13831056 is about 3719.0127722287. The cubic root of 13831056 is about 240.0408263880.

Adding to 13831056 its reverse (65013831), we get a palindrome (78844887).

The spelling of 13831056 in words is "thirteen million, eight hundred thirty-one thousand, fifty-six".