22891 has 4 divisors (see below), whose sum is σ = 24984. Its totient is φ = 20800.

The previous prime is 22877. The next prime is 22901. The reversal of 22891 is 19822.

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 22891 - 2⁵ = 22859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22811) 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, 1030 + ... + 1051.

It is an arithmetic number, because the mean of its divisors is an integer number (6246).

2²²⁸⁹¹ is an apocalyptic number.

22891 is a deficient number, since it is larger than the sum of its proper divisors (2093).

22891 is a wasteful number, since it uses less digits than its factorization.

22891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2092.

The product of its digits is 288, while the sum is 22.

The square root of 22891 is about 151.2977197449. The cubic root of 22891 is about 28.3936737876.

The spelling of 22891 in words is "twenty-two thousand, eight hundred ninety-one".