222243444 has 36 divisors (see below), whose sum is σ = 562678116. Its totient is φ = 73963008.

The previous prime is 222243421. The next prime is 222243449. The reversal of 222243444 is 444342222.

222243444 is a `hidden beast` number, since 2 + 222 + 434 + 4 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 31472100 + 190771344 = 5610^2 + 13812^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×222243444² = 98784296801962272, which contains 22 as substring.

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 (222243449) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19642 + ... + 28814.

Almost surely, 2^222243444 is an apocalyptic number.

It is an amenable number.

222243444 is an abundant number, since it is smaller than the sum of its proper divisors (340434672).

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

222243444 is a wasteful number, since it uses less digits than its factorization.

222243444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9856 (or 9851 counting only the distinct ones).

The product of its digits is 12288, while the sum is 27.

The square root of 222243444 is about 14907.8316330713. The cubic root of 222243444 is about 605.7261449283.

Adding to 222243444 its reverse (444342222), we get a palindrome (666585666).

The spelling of 222243444 in words is "two hundred twenty-two million, two hundred forty-three thousand, four hundred forty-four".