13815256 has 48 divisors (see below), whose sum is σ = 32462640. Its totient is φ = 5463360.

The previous prime is 13815253. The next prime is 13815257. The reversal of 13815256 is 65251831.

It is a super-2 number, since 2×13815256² = 381722596691072, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13815253) 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 11 ways as a sum of consecutive naturals, for example, 3741 + ... + 6451.

It is an arithmetic number, because the mean of its divisors is an integer number (676305).

Almost surely, 2^13815256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13815256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16231320).

13815256 is an abundant number, since it is smaller than the sum of its proper divisors (18647384).

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

13815256 is a wasteful number, since it uses less digits than its factorization.

13815256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2744 (or 2733 counting only the distinct ones).

The product of its digits is 7200, while the sum is 31.

The square root of 13815256 is about 3716.8879455803. The cubic root of 13815256 is about 239.9493874754.

The spelling of 13815256 in words is "thirteen million, eight hundred fifteen thousand, two hundred fifty-six".