2891155 has 16 divisors (see below), whose sum is σ = 3640320. Its totient is φ = 2201472.

The previous prime is 2891137. The next prime is 2891171. The reversal of 2891155 is 5511982.

2891155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 2891155 - 2¹³ = 2882963 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 18337 + ... + 18493.

It is an arithmetic number, because the mean of its divisors is an integer number (227520).

2^2891155 is an apocalyptic number.

2891155 is a deficient number, since it is larger than the sum of its proper divisors (749165).

2891155 is a wasteful number, since it uses less digits than its factorization.

2891155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318.

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

The square root of 2891155 is about 1700.3396719479. The cubic root of 2891155 is about 142.4591860133.

It can be divided in two parts, 289 and 1155, that added together give a square (1444 = 38²).

The spelling of 2891155 in words is "two million, eight hundred ninety-one thousand, one hundred fifty-five".