221420333 has 8 divisors (see below), whose sum is σ = 234964800. Its totient is φ = 208202368.

The previous prime is 221420323. The next prime is 221420347. The reversal of 221420333 is 333024122.

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

It is a cyclic number.

It is not a de Polignac number, because 221420333 - 2⁸ = 221420077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221420323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80228 + ... + 82941.

It is an arithmetic number, because the mean of its divisors is an integer number (29370600).

Almost surely, 2^221420333 is an apocalyptic number.

221420333 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

221420333 is a deficient number, since it is larger than the sum of its proper divisors (13544467).

221420333 is a wasteful number, since it uses less digits than its factorization.

221420333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163251.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 221420333 is about 14880.1993602236. The cubic root of 221420333 is about 604.9774214646.

Adding to 221420333 its reverse (333024122), we get a palindrome (554444455).

The spelling of 221420333 in words is "two hundred twenty-one million, four hundred twenty thousand, three hundred thirty-three".