222538 has 4 divisors (see below), whose sum is σ = 333810. Its totient is φ = 111268.

The previous prime is 222533. The next prime is 222553. The reversal of 222538 is 835222.

222538 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 208849 + 13689 = 457^2 + 117^2 .

It is a super-2 number, since 2×222538² = 99046322888, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (222533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55633 + ... + 55636.

2²²²⁵³⁸ is an apocalyptic number.

222538 is a deficient number, since it is larger than the sum of its proper divisors (111272).

222538 is a wasteful number, since it uses less digits than its factorization.

222538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111271.

The product of its digits is 960, while the sum is 22.

The square root of 222538 is about 471.7393348026. The cubic root of 222538 is about 60.5993631639.

The spelling of 222538 in words is "two hundred twenty-two thousand, five hundred thirty-eight".