221335329 has 16 divisors (see below), whose sum is σ = 299859840. Its totient is φ = 145192320.

The previous prime is 221335273. The next prime is 221335333. The reversal of 221335329 is 923533122.

It is not a de Polignac number, because 221335329 - 2⁷ = 221335201 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221335296 and 221335305.

It is not an unprimeable number, because it can be changed into a prime (221335129) 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 15 ways as a sum of consecutive naturals, for example, 199027 + ... + 200135.

It is an arithmetic number, because the mean of its divisors is an integer number (18741240).

Almost surely, 2^221335329 is an apocalyptic number.

It is an amenable number.

221335329 is a deficient number, since it is larger than the sum of its proper divisors (78524511).

221335329 is a wasteful number, since it uses less digits than its factorization.

221335329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2120.

The product of its digits is 9720, while the sum is 30.

The square root of 221335329 is about 14877.3428071010. The cubic root of 221335329 is about 604.8999939429.

The spelling of 221335329 in words is "two hundred twenty-one million, three hundred thirty-five thousand, three hundred twenty-nine".