221894930 has 8 divisors (see below), whose sum is σ = 399410892. Its totient is φ = 88757968.

The previous prime is 221894917. The next prime is 221894971. The reversal of 221894930 is 39498122.

221894930 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 212780569 + 9114361 = 14587^2 + 3019^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11094737 + ... + 11094756.

Almost surely, 2^221894930 is an apocalyptic number.

221894930 is a deficient number, since it is larger than the sum of its proper divisors (177515962).

221894930 is a wasteful number, since it uses less digits than its factorization.

221894930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22189500.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 221894930 is about 14896.1380901226. The cubic root of 221894930 is about 605.4093534516.

The spelling of 221894930 in words is "two hundred twenty-one million, eight hundred ninety-four thousand, nine hundred thirty".