221433452 has 6 divisors (see below), whose sum is σ = 387508548. Its totient is φ = 110716724.

The previous prime is 221433437. The next prime is 221433479. The reversal of 221433452 is 254334122.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27679178 + ... + 27679185.

It is an arithmetic number, because the mean of its divisors is an integer number (64584758).

Almost surely, 2^221433452 is an apocalyptic number.

It is an amenable number.

221433452 is a deficient number, since it is larger than the sum of its proper divisors (166075096).

221433452 is a wasteful number, since it uses less digits than its factorization.

221433452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55358367 (or 55358365 counting only the distinct ones).

The product of its digits is 5760, while the sum is 26.

The square root of 221433452 is about 14880.6401744011. The cubic root of 221433452 is about 604.9893693918.

Adding to 221433452 its reverse (254334122), we get a palindrome (475767574).

The spelling of 221433452 in words is "two hundred twenty-one million, four hundred thirty-three thousand, four hundred fifty-two".