222785 has 8 divisors (see below), whose sum is σ = 283176. Its totient is φ = 167680.

The previous prime is 222779. The next prime is 222787. The reversal of 222785 is 587222.

It is a Cunningham number, because it is equal to 472²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 80656 + 142129 = 284^2 + 377^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-222785 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222787) 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, 1226 + ... + 1395.

It is an arithmetic number, because the mean of its divisors is an integer number (35397).

2²²²⁷⁸⁵ is an apocalyptic number.

It is an amenable number.

222785 is a deficient number, since it is larger than the sum of its proper divisors (60391).

222785 is a wasteful number, since it uses less digits than its factorization.

222785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2643.

The product of its digits is 2240, while the sum is 26.

The square root of 222785 is about 472.0010593208. The cubic root of 222785 is about 60.6217750791.

The spelling of 222785 in words is "two hundred twenty-two thousand, seven hundred eighty-five".