221422324 has 6 divisors (see below), whose sum is σ = 387489074. Its totient is φ = 110711160.

The previous prime is 221422309. The next prime is 221422349. The reversal of 221422324 is 423224122.

221422324 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 159516900 + 61905424 = 12630^2 + 7868^2 .

It is a junction number, because it is equal to n+sod(n) for n = 221422295 and 221422304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27677787 + ... + 27677794.

Almost surely, 2^221422324 is an apocalyptic number.

It is an amenable number.

221422324 is a deficient number, since it is larger than the sum of its proper divisors (166066750).

221422324 is a wasteful number, since it uses less digits than its factorization.

221422324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55355585 (or 55355583 counting only the distinct ones).

The product of its digits is 1536, while the sum is 22.

The square root of 221422324 is about 14880.2662610586. The cubic root of 221422324 is about 604.9792347676.

Adding to 221422324 its reverse (423224122), we get a palindrome (644646446).

The spelling of 221422324 in words is "two hundred twenty-one million, four hundred twenty-two thousand, three hundred twenty-four".