222012644 has 24 divisors (see below), whose sum is σ = 467396160. Its totient is φ = 90140256.

The previous prime is 222012619. The next prime is 222012649. The reversal of 222012644 is 446210222.

222012644 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×222012644² = 98579228191741472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (222012649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 208127 + ... + 209190.

It is an arithmetic number, because the mean of its divisors is an integer number (19474840).

Almost surely, 2^222012644 is an apocalyptic number.

It is an amenable number.

222012644 is an abundant number, since it is smaller than the sum of its proper divisors (245383516).

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

222012644 is a wasteful number, since it uses less digits than its factorization.

222012644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417347 (or 417345 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 222012644 is about 14900.0887245681. The cubic root of 222012644 is about 605.5163899342.

Adding to 222012644 its reverse (446210222), we get a palindrome (668222866).

The spelling of 222012644 in words is "two hundred twenty-two million, twelve thousand, six hundred forty-four".