221422244 has 6 divisors (see below), whose sum is σ = 387488934. Its totient is φ = 110711120.

The previous prime is 221422241. The next prime is 221422247. The reversal of 221422244 is 442224122.

It is an interprime number because it is at equal distance from previous prime (221422241) and next prime (221422247).

It can be written as a sum of positive squares in only one way, i.e., 210598144 + 10824100 = 14512^2 + 3290^2 .

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

It is not an unprimeable number, because it can be changed into a prime (221422241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27677777 + ... + 27677784.

It is an arithmetic number, because the mean of its divisors is an integer number (64581489).

Almost surely, 2^221422244 is an apocalyptic number.

It is an amenable number.

221422244 is a deficient number, since it is larger than the sum of its proper divisors (166066690).

221422244 is a wasteful number, since it uses less digits than its factorization.

221422244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55355565 (or 55355563 counting only the distinct ones).

The product of its digits is 2048, while the sum is 23.

The square root of 221422244 is about 14880.2635729345. The cubic root of 221422244 is about 604.9791619078.

Adding to 221422244 its reverse (442224122), we get a palindrome (663646366).

The spelling of 221422244 in words is "two hundred twenty-one million, four hundred twenty-two thousand, two hundred forty-four".