221730794 has 8 divisors (see below), whose sum is σ = 333188640. Its totient is φ = 110667916.

The previous prime is 221730793. The next prime is 221730797. The reversal of 221730794 is 497037122.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (221730793) 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, 97334 + ... + 99585.

It is an arithmetic number, because the mean of its divisors is an integer number (41648580).

Almost surely, 2^221730794 is an apocalyptic number.

221730794 is a deficient number, since it is larger than the sum of its proper divisors (111457846).

221730794 is a wasteful number, since it uses less digits than its factorization.

221730794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197484.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 221730794 is about 14890.6277235045. The cubic root of 221730794 is about 605.2600425729.

The spelling of 221730794 in words is "two hundred twenty-one million, seven hundred thirty thousand, seven hundred ninety-four".