221033434 has 8 divisors (see below), whose sum is σ = 331613280. Its totient is φ = 110495676.

The previous prime is 221033429. The next prime is 221033453. The reversal of 221033434 is 434330122.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14737 + ... + 25675.

It is an arithmetic number, because the mean of its divisors is an integer number (41451660).

Almost surely, 2^221033434 is an apocalyptic number.

221033434 is a deficient number, since it is larger than the sum of its proper divisors (110579846).

221033434 is a wasteful number, since it uses less digits than its factorization.

221033434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21044.

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 221033434 is about 14867.1932119012. The cubic root of 221033434 is about 604.6248467635.

Adding to 221033434 its reverse (434330122), we get a palindrome (655363556).

The spelling of 221033434 in words is "two hundred twenty-one million, thirty-three thousand, four hundred thirty-four".