2881851 has 16 divisors (see below), whose sum is σ = 4435200. Its totient is φ = 1630368.

The previous prime is 2881799. The next prime is 2881859. The reversal of 2881851 is 1581882.

It is not a de Polignac number, because 2881851 - 2¹⁰ = 2880827 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2881859) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1660 + ... + 2918.

It is an arithmetic number, because the mean of its divisors is an integer number (277200).

2^2881851 is an apocalyptic number.

2881851 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2881851 is a deficient number, since it is larger than the sum of its proper divisors (1553349).

2881851 is a wasteful number, since it uses less digits than its factorization.

2881851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1378.

The product of its digits is 5120, while the sum is 33.

The square root of 2881851 is about 1697.6015433546. The cubic root of 2881851 is about 142.3062062515.

The spelling of 2881851 in words is "two million, eight hundred eighty-one thousand, eight hundred fifty-one".