222145 has 16 divisors (see below), whose sum is σ = 332928. Its totient is φ = 138240.

The previous prime is 222137. The next prime is 222149. The reversal of 222145 is 541222.

222145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 222145 - 2³ = 222137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97 + ... + 673.

It is an arithmetic number, because the mean of its divisors is an integer number (20808).

2²²²¹⁴⁵ is an apocalyptic number.

222145 is the 385-th pentagonal number.

It is an amenable number.

222145 is a deficient number, since it is larger than the sum of its proper divisors (110783).

222145 is a wasteful number, since it uses less digits than its factorization.

222145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600.

The product of its digits is 160, while the sum is 16.

The square root of 222145 is about 471.3226071387. The cubic root of 222145 is about 60.5636695104.

Adding to 222145 its reverse (541222), we get a palindrome (763367).

The spelling of 222145 in words is "two hundred twenty-two thousand, one hundred forty-five".