2881155 has 16 divisors (see below), whose sum is σ = 4634784. Its totient is φ = 1528320.

The previous prime is 2881139. The next prime is 2881159. The reversal of 2881155 is 5511882.

It is not a de Polignac number, because 2881155 - 2⁴ = 2881139 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2881159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3217 + ... + 4013.

It is an arithmetic number, because the mean of its divisors is an integer number (289674).

2^2881155 is an apocalyptic number.

2881155 is a deficient number, since it is larger than the sum of its proper divisors (1753629).

2881155 is a wasteful number, since it uses less digits than its factorization.

2881155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1046.

The product of its digits is 3200, while the sum is 30.

The square root of 2881155 is about 1697.3965358749. The cubic root of 2881155 is about 142.2947491366.

The spelling of 2881155 in words is "two million, eight hundred eighty-one thousand, one hundred fifty-five".