2815256 has 16 divisors (see below), whose sum is σ = 5421840. Its totient is φ = 1369440.

The previous prime is 2815247. The next prime is 2815259. The reversal of 2815256 is 6525182.

2815256 = 101² + 102² + ... + 211².

2815256 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2815259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4460 + ... + 5051.

It is an arithmetic number, because the mean of its divisors is an integer number (338865).

2^2815256 is an apocalyptic number.

It is an amenable number.

2815256 is a deficient number, since it is larger than the sum of its proper divisors (2606584).

2815256 is a wasteful number, since it uses less digits than its factorization.

2815256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9554 (or 9550 counting only the distinct ones).

The product of its digits is 4800, while the sum is 29.

The square root of 2815256 is about 1677.8724623761. The cubic root of 2815256 is about 141.2014958633.

The spelling of 2815256 in words is "two million, eight hundred fifteen thousand, two hundred fifty-six".