2855191 has 4 divisors (see below), whose sum is σ = 2862000. Its totient is φ = 2848384.

The previous prime is 2855189. The next prime is 2855207. The reversal of 2855191 is 1915582.

2855191 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2855191 - 2¹ = 2855189 is a prime.

It is an Ulam number.

It is a Duffinian number.

2855191 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2855101) 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, 2731 + ... + 3628.

It is an arithmetic number, because the mean of its divisors is an integer number (715500).

2^2855191 is an apocalyptic number.

2855191 is a deficient number, since it is larger than the sum of its proper divisors (6809).

2855191 is an equidigital number, since it uses as much as digits as its factorization.

2855191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6808.

The product of its digits is 3600, while the sum is 31.

The square root of 2855191 is about 1689.7310436871. The cubic root of 2855191 is about 141.8660212189.

It can be divided in two parts, 285 and 5191, that added together give a square (5476 = 74²).

The spelling of 2855191 in words is "two million, eight hundred fifty-five thousand, one hundred ninety-one".