221333734 has 8 divisors (see below), whose sum is σ = 333174600. Its totient is φ = 110275536.

The previous prime is 221333719. The next prime is 221333743. The reversal of 221333734 is 437333122.

221333734 is digitally balanced in base 3, 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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194959 + ... + 196090.

It is an arithmetic number, because the mean of its divisors is an integer number (41646825).

Almost surely, 2^221333734 is an apocalyptic number.

221333734 is a deficient number, since it is larger than the sum of its proper divisors (111840866).

221333734 is a wasteful number, since it uses less digits than its factorization.

221333734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391334.

The product of its digits is 9072, while the sum is 28.

The square root of 221333734 is about 14877.2892020018. The cubic root of 221333734 is about 604.8985409171.

Adding to 221333734 its reverse (437333122), we get a palindrome (658666856).

The spelling of 221333734 in words is "two hundred twenty-one million, three hundred thirty-three thousand, seven hundred thirty-four".