285222 has 16 divisors (see below), whose sum is σ = 652032. Its totient is φ = 81480.

The previous prime is 285221. The next prime is 285227. The reversal of 285222 is 222582.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3354 + ... + 3437.

It is an arithmetic number, because the mean of its divisors is an integer number (40752).

2²⁸⁵²²² is an apocalyptic number.

285222 is an abundant number, since it is smaller than the sum of its proper divisors (366810).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

285222 is a wasteful number, since it uses less digits than its factorization.

285222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6803.

The product of its digits is 640, while the sum is 21.

The square root of 285222 is about 534.0617941774. The cubic root of 285222 is about 65.8255263223.

The spelling of 285222 in words is "two hundred eighty-five thousand, two hundred twenty-two".