221434432 has 28 divisors (see below), whose sum is σ = 458516736. Its totient is φ = 105902720.

The previous prime is 221434361. The next prime is 221434471. The reversal of 221434432 is 234434122.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 221434397 and 221434406.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 73744 + ... + 76687.

Almost surely, 2^221434432 is an apocalyptic number.

It is an amenable number.

221434432 is an abundant number, since it is smaller than the sum of its proper divisors (237082304).

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

221434432 is a wasteful number, since it uses less digits than its factorization.

221434432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150466 (or 150456 counting only the distinct ones).

The product of its digits is 4608, while the sum is 25.

The square root of 221434432 is about 14880.6731030555. The cubic root of 221434432 is about 604.9902618928.

Adding to 221434432 its reverse (234434122), we get a palindrome (455868554).

The spelling of 221434432 in words is "two hundred twenty-one million, four hundred thirty-four thousand, four hundred thirty-two".