221034433 has 16 divisors (see below), whose sum is σ = 240537600. Its totient is φ = 202587840.

The previous prime is 221034419. The next prime is 221034449. The reversal of 221034433 is 334430122.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221034433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221034133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45328 + ... + 49966.

It is an arithmetic number, because the mean of its divisors is an integer number (15033600).

Almost surely, 2^221034433 is an apocalyptic number.

It is an amenable number.

221034433 is a deficient number, since it is larger than the sum of its proper divisors (19503167).

221034433 is a wasteful number, since it uses less digits than its factorization.

221034433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4752.

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

The square root of 221034433 is about 14867.2268093280. The cubic root of 221034433 is about 604.6257576653.

Adding to 221034433 its reverse (334430122), we get a palindrome (555464555).

The spelling of 221034433 in words is "two hundred twenty-one million, thirty-four thousand, four hundred thirty-three".