222161112 has 96 divisors (see below), whose sum is σ = 629085600. Its totient is φ = 70737408.

The previous prime is 222161111. The next prime is 222161113. The reversal of 222161112 is 211161222.

222161112 is a `hidden beast` number, since 22 + 21 + 611 + 12 = 666.

It is an interprime number because it is at equal distance from previous prime (222161111) and next prime (222161113).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222161111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 214548 + ... + 215580.

It is an arithmetic number, because the mean of its divisors is an integer number (6552975).

Almost surely, 2^222161112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222161112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (314542800).

222161112 is an abundant number, since it is smaller than the sum of its proper divisors (406924488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

222161112 is a wasteful number, since it uses less digits than its factorization.

222161112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1177 (or 1170 counting only the distinct ones).

The product of its digits is 96, while the sum is 18.

The square root of 222161112 is about 14905.0700098993. The cubic root of 222161112 is about 605.6513368655.

The spelling of 222161112 in words is "two hundred twenty-two million, one hundred sixty-one thousand, one hundred twelve".