221813794 has 8 divisors (see below), whose sum is σ = 347186880. Its totient is φ = 106084836.

The previous prime is 221813783. The next prime is 221813797. The reversal of 221813794 is 497318122.

221813794 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 not an unprimeable number, because it can be changed into a prime (221813797) 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, 2410974 + ... + 2411065.

It is an arithmetic number, because the mean of its divisors is an integer number (43398360).

Almost surely, 2^221813794 is an apocalyptic number.

221813794 is a deficient number, since it is larger than the sum of its proper divisors (125373086).

221813794 is a wasteful number, since it uses less digits than its factorization.

221813794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4822064.

The product of its digits is 24192, while the sum is 37.

The square root of 221813794 is about 14893.4144506893. The cubic root of 221813794 is about 605.3355550380.

The spelling of 221813794 in words is "two hundred twenty-one million, eight hundred thirteen thousand, seven hundred ninety-four".