221699994 has 8 divisors (see below), whose sum is σ = 443400000. Its totient is φ = 73899996.

The previous prime is 221699969. The next prime is 221700001. The reversal of 221699994 is 499996122.

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

221699994 is an admirable number.

It is a Curzon number.

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, 18474994 + ... + 18475005.

It is an arithmetic number, because the mean of its divisors is an integer number (55425000).

Almost surely, 2^221699994 is an apocalyptic number.

221699994 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.

221699994 is a wasteful number, since it uses less digits than its factorization.

221699994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36950004.

The product of its digits is 629856, while the sum is 51.

The square root of 221699994 is about 14889.5934800115. The cubic root of 221699994 is about 605.2320162860.

The spelling of 221699994 in words is "two hundred twenty-one million, six hundred ninety-nine thousand, nine hundred ninety-four".