222345 has 28 divisors (see below), whose sum is σ = 406596. Its totient is φ = 116640.

The previous prime is 222337. The next prime is 222347. The reversal of 222345 is 543222.

It can be written as a sum of positive squares in 2 ways, for example, as 35721 + 186624 = 189^2 + 432^2 .

It is not a de Polignac number, because 222345 - 2³ = 222337 is a prime.

It is a plaindrome in base 10.

It is a nialpdrome in base 8.

It is a zygodrome in base 8.

It is not an unprimeable number, because it can be changed into a prime (222347) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 3615 + ... + 3675.

2²²²³⁴⁵ is an apocalyptic number.

It is an amenable number.

222345 is a deficient number, since it is larger than the sum of its proper divisors (184251).

222345 is an frugal number, since it uses more digits than its factorization.

222345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84 (or 69 counting only the distinct ones).

The product of its digits is 480, while the sum is 18.

The square root of 222345 is about 471.5347283075. The cubic root of 222345 is about 60.5818394754.

Adding to 222345 its reverse (543222), we get a palindrome (765567).

The spelling of 222345 in words is "two hundred twenty-two thousand, three hundred forty-five".