2165255 has 4 divisors (see below), whose sum is σ = 2598312. Its totient is φ = 1732200.

The previous prime is 2165249. The next prime is 2165291. The reversal of 2165255 is 5525612.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-2165255 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216521 + ... + 216530.

It is an arithmetic number, because the mean of its divisors is an integer number (649578).

2^2165255 is an apocalyptic number.

2165255 is a deficient number, since it is larger than the sum of its proper divisors (433057).

2165255 is an equidigital number, since it uses as much as digits as its factorization.

2165255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433056.

The product of its digits is 3000, while the sum is 26.

The square root of 2165255 is about 1471.4805469322. The cubic root of 2165255 is about 129.3708257111.

The spelling of 2165255 in words is "two million, one hundred sixty-five thousand, two hundred fifty-five".