291151 has 4 divisors (see below), whose sum is σ = 332752. Its totient is φ = 249552.

The previous prime is 291143. The next prime is 291167. The reversal of 291151 is 151192.

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

It is a cyclic number.

It is not a de Polignac number, because 291151 - 2³ = 291143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (291101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20790 + ... + 20803.

It is an arithmetic number, because the mean of its divisors is an integer number (83188).

2²⁹¹¹⁵¹ is an apocalyptic number.

291151 is a deficient number, since it is larger than the sum of its proper divisors (41601).

291151 is an equidigital number, since it uses as much as digits as its factorization.

291151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41600.

The product of its digits is 90, while the sum is 19.

The square root of 291151 is about 539.5840990986. The cubic root of 291151 is about 66.2785138918.

The spelling of 291151 in words is "two hundred ninety-one thousand, one hundred fifty-one".