181222 has 12 divisors (see below), whose sum is σ = 288036. Its totient is φ = 85500.

The previous prime is 181219. The next prime is 181243. The reversal of 181222 is 222181.

181222 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 181196 and 181205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 597 + ... + 847.

It is an arithmetic number, because the mean of its divisors is an integer number (24003).

2¹⁸¹²²² is an apocalyptic number.

181222 is a deficient number, since it is larger than the sum of its proper divisors (106814).

181222 is a wasteful number, since it uses less digits than its factorization.

181222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291 (or 272 counting only the distinct ones).

The product of its digits is 64, while the sum is 16.

The square root of 181222 is about 425.7017735458. The cubic root of 181222 is about 56.5896454565.

The spelling of 181222 in words is "one hundred eighty-one thousand, two hundred twenty-two".