221338734 has 8 divisors (see below), whose sum is σ = 442677480. Its totient is φ = 73779576.

The previous prime is 221338727. The next prime is 221338739. The reversal of 221338734 is 437833122.

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

221338734 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 221338695 and 221338704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221338739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18444889 + ... + 18444900.

It is an arithmetic number, because the mean of its divisors is an integer number (55334685).

Almost surely, 2^221338734 is an apocalyptic number.

221338734 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221338734 is a wasteful number, since it uses less digits than its factorization.

221338734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36889794.

The product of its digits is 24192, while the sum is 33.

The square root of 221338734 is about 14877.4572424188. The cubic root of 221338734 is about 604.9030958334.

The spelling of 221338734 in words is "two hundred twenty-one million, three hundred thirty-eight thousand, seven hundred thirty-four".