221029994 has 8 divisors (see below), whose sum is σ = 331756128. Its totient is φ = 110444620.

The previous prime is 221029993. The next prime is 221030003. The reversal of 221029994 is 499920122.

221029994 is digitally balanced in base 2, 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 (221029993) 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, 31172 + ... + 37599.

It is an arithmetic number, because the mean of its divisors is an integer number (41469516).

Almost surely, 2^221029994 is an apocalyptic number.

221029994 is a deficient number, since it is larger than the sum of its proper divisors (110726134).

221029994 is a wasteful number, since it uses less digits than its factorization.

221029994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70380.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 221029994 is about 14867.0775204813. The cubic root of 221029994 is about 604.6217101034.

The spelling of 221029994 in words is "two hundred twenty-one million, twenty-nine thousand, nine hundred ninety-four".