291055 has 4 divisors (see below), whose sum is σ = 349272. Its totient is φ = 232840.

The previous prime is 291043. The next prime is 291077. The reversal of 291055 is 550192.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-291055 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 29101 + ... + 29110.

It is an arithmetic number, because the mean of its divisors is an integer number (87318).

2²⁹¹⁰⁵⁵ is an apocalyptic number.

291055 is a deficient number, since it is larger than the sum of its proper divisors (58217).

291055 is an equidigital number, since it uses as much as digits as its factorization.

291055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58216.

The product of its (nonzero) digits is 450, while the sum is 22.

The square root of 291055 is about 539.4951343617. The cubic root of 291055 is about 66.2712285121.

The spelling of 291055 in words is "two hundred ninety-one thousand, fifty-five".