2156256 has 36 divisors (see below), whose sum is σ = 6132672. Its totient is φ = 718656.

The previous prime is 2156251. The next prime is 2156269. The reversal of 2156256 is 6526512.

It is a tau number, because it is divible by the number of its divisors (36).

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156251) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3456 + ... + 4031.

It is an arithmetic number, because the mean of its divisors is an integer number (170352).

2^2156256 is an apocalyptic number.

It is an amenable number.

2156256 is an abundant number, since it is smaller than the sum of its proper divisors (3976416).

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

2156256 is a wasteful number, since it uses less digits than its factorization.

2156256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7503 (or 7492 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 2156256 is about 1468.4195585731. The cubic root of 2156256 is about 129.1913511385.

The spelling of 2156256 in words is "two million, one hundred fifty-six thousand, two hundred fifty-six".