222432421 has 16 divisors (see below), whose sum is σ = 236573568. Its totient is φ = 208857600.

The previous prime is 222432391. The next prime is 222432433. The reversal of 222432421 is 124234222.

It is a cyclic number.

It is not a de Polignac number, because 222432421 - 2⁵ = 222432389 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222432392 and 222432401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222436421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124285 + ... + 126061.

It is an arithmetic number, because the mean of its divisors is an integer number (14785848).

Almost surely, 2^222432421 is an apocalyptic number.

It is an amenable number.

222432421 is a deficient number, since it is larger than the sum of its proper divisors (14141147).

222432421 is a wasteful number, since it uses less digits than its factorization.

222432421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1932.

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

The square root of 222432421 is about 14914.1684649195. The cubic root of 222432421 is about 605.8977823578.

Adding to 222432421 its reverse (124234222), we get a palindrome (346666643).

The spelling of 222432421 in words is "two hundred twenty-two million, four hundred thirty-two thousand, four hundred twenty-one".