2255891 has 4 divisors (see below), whose sum is σ = 2460984. Its totient is φ = 2050800.

The previous prime is 2255887. The next prime is 2255899. The reversal of 2255891 is 1985522.

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

It is a cyclic number.

It is not a de Polignac number, because 2255891 - 2² = 2255887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2255899) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102530 + ... + 102551.

It is an arithmetic number, because the mean of its divisors is an integer number (615246).

2^2255891 is an apocalyptic number.

2255891 is a deficient number, since it is larger than the sum of its proper divisors (205093).

2255891 is a wasteful number, since it uses less digits than its factorization.

2255891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205092.

The product of its digits is 7200, while the sum is 32.

The square root of 2255891 is about 1501.9623830176. The cubic root of 2255891 is about 131.1513314368.

It can be divided in two parts, 225 and 5891, that added together give a palindrome (6116).

The spelling of 2255891 in words is "two million, two hundred fifty-five thousand, eight hundred ninety-one".