221143433 has 8 divisors (see below), whose sum is σ = 252831168. Its totient is φ = 189479664.

The previous prime is 221143423. The next prime is 221143441. The reversal of 221143433 is 334341122.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221143433 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221143399 and 221143408.

It is not an unprimeable number, because it can be changed into a prime (221143423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23435 + ... + 31487.

It is an arithmetic number, because the mean of its divisors is an integer number (31603896).

Almost surely, 2^221143433 is an apocalyptic number.

It is an amenable number.

221143433 is a deficient number, since it is larger than the sum of its proper divisors (31687735).

221143433 is an equidigital number, since it uses as much as digits as its factorization.

221143433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11983.

The product of its digits is 1728, while the sum is 23.

The square root of 221143433 is about 14870.8921386714. The cubic root of 221143433 is about 604.7251288755.

Adding to 221143433 its reverse (334341122), we get a palindrome (555484555).

The spelling of 221143433 in words is "two hundred twenty-one million, one hundred forty-three thousand, four hundred thirty-three".