222112512 has 108 divisors (see below), whose sum is σ = 645699600. Its totient is φ = 73426944.

The previous prime is 222112487. The next prime is 222112543. The reversal of 222112512 is 215211222.

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 342973 + ... + 343619.

It is an arithmetic number, because the mean of its divisors is an integer number (5978700).

Almost surely, 2^222112512 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 222112512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (322849800).

222112512 is an abundant number, since it is smaller than the sum of its proper divisors (423587088).

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

222112512 is a wasteful number, since it uses less digits than its factorization.

222112512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 818 (or 801 counting only the distinct ones).

The product of its digits is 160, while the sum is 18.

The square root of 222112512 is about 14903.4396029910. The cubic root of 222112512 is about 605.6071695173.

Adding to 222112512 its reverse (215211222), we get a palindrome (437323734).

The spelling of 222112512 in words is "two hundred twenty-two million, one hundred twelve thousand, five hundred twelve".