2851191 has 24 divisors (see below), whose sum is σ = 4752384. Its totient is φ = 1613520.

The previous prime is 2851187. The next prime is 2851231. The reversal of 2851191 is 1911582.

It is not a de Polignac number, because 2851191 - 2² = 2851187 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2851111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10386 + ... + 10656.

It is an arithmetic number, because the mean of its divisors is an integer number (198016).

2^2851191 is an apocalyptic number.

2851191 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2851191 is a deficient number, since it is larger than the sum of its proper divisors (1901193).

2851191 is a wasteful number, since it uses less digits than its factorization.

2851191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451 (or 448 counting only the distinct ones).

The product of its digits is 720, while the sum is 27.

The square root of 2851191 is about 1688.5470085254. The cubic root of 2851191 is about 141.7997408557.

The spelling of 2851191 in words is "two million, eight hundred fifty-one thousand, one hundred ninety-one".