222871 has 4 divisors (see below), whose sum is σ = 243144. Its totient is φ = 202600.

The previous prime is 222863. The next prime is 222877. The reversal of 222871 is 178222.

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 222871 - 2³ = 222863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222877) 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, 10120 + ... + 10141.

It is an arithmetic number, because the mean of its divisors is an integer number (60786).

2²²²⁸⁷¹ is an apocalyptic number.

222871 is a deficient number, since it is larger than the sum of its proper divisors (20273).

222871 is a wasteful number, since it uses less digits than its factorization.

222871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20272.

The product of its digits is 448, while the sum is 22.

The square root of 222871 is about 472.0921520212. The cubic root of 222871 is about 60.6295745299.

The spelling of 222871 in words is "two hundred twenty-two thousand, eight hundred seventy-one".