222891 has 4 divisors (see below), whose sum is σ = 297192. Its totient is φ = 148592.

The previous prime is 222883. The next prime is 222913. The reversal of 222891 is 198222.

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 222891 - 2³ = 222883 is a prime.

It is a D-number.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (222841) by changing a digit.

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, 37146 + ... + 37151.

It is an arithmetic number, because the mean of its divisors is an integer number (74298).

2²²²⁸⁹¹ is an apocalyptic number.

222891 is a deficient number, since it is larger than the sum of its proper divisors (74301).

222891 is an equidigital number, since it uses as much as digits as its factorization.

222891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74300.

The product of its digits is 576, while the sum is 24.

The square root of 222891 is about 472.1133338511. The cubic root of 222891 is about 60.6313880681.

The spelling of 222891 in words is "two hundred twenty-two thousand, eight hundred ninety-one".