221430334 has 8 divisors (see below), whose sum is σ = 342859968. Its totient is φ = 107143680.

The previous prime is 221430329. The next prime is 221430353. The reversal of 221430334 is 433034122.

It is a happy number.

221430334 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

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, 1785667 + ... + 1785790.

It is an arithmetic number, because the mean of its divisors is an integer number (42857496).

Almost surely, 2^221430334 is an apocalyptic number.

221430334 is a deficient number, since it is larger than the sum of its proper divisors (121429634).

221430334 is a wasteful number, since it uses less digits than its factorization.

221430334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3571490.

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

The square root of 221430334 is about 14880.5354070343. The cubic root of 221430334 is about 604.9865297641.

Adding to 221430334 its reverse (433034122), we get a palindrome (654464456).

The spelling of 221430334 in words is "two hundred twenty-one million, four hundred thirty thousand, three hundred thirty-four".