2155236 has 12 divisors (see below), whose sum is σ = 5028912. Its totient is φ = 718408.

The previous prime is 2155207. The next prime is 2155253. The reversal of 2155236 is 6325512.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89790 + ... + 89813.

It is an arithmetic number, because the mean of its divisors is an integer number (419076).

2^2155236 is an apocalyptic number.

It is an amenable number.

2155236 is an abundant number, since it is smaller than the sum of its proper divisors (2873676).

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

2155236 is a wasteful number, since it uses less digits than its factorization.

2155236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179610 (or 179608 counting only the distinct ones).

The product of its digits is 1800, while the sum is 24.

The square root of 2155236 is about 1468.0722053087. The cubic root of 2155236 is about 129.1709769402.

The spelling of 2155236 in words is "two million, one hundred fifty-five thousand, two hundred thirty-six".