222172189 has 4 divisors (see below), whose sum is σ = 223643680. Its totient is φ = 220700700.

The previous prime is 222172169. The next prime is 222172207. The reversal of 222172189 is 981271222.

222172189 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 981271222 = 2 ⋅490635611.

It is a cyclic number.

It is not a de Polignac number, because 222172189 - 2⁷ = 222172061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222172109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 735519 + ... + 735820.

It is an arithmetic number, because the mean of its divisors is an integer number (55910920).

Almost surely, 2^222172189 is an apocalyptic number.

It is an amenable number.

222172189 is a deficient number, since it is larger than the sum of its proper divisors (1471491).

222172189 is a wasteful number, since it uses less digits than its factorization.

222172189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1471490.

The product of its digits is 8064, while the sum is 34.

The square root of 222172189 is about 14905.4415902381. The cubic root of 222172189 is about 605.6614026661.

The spelling of 222172189 in words is "two hundred twenty-two million, one hundred seventy-two thousand, one hundred eighty-nine".