221427304 has 32 divisors (see below), whose sum is σ = 477348480. Its totient is φ = 94325184.

The previous prime is 221427289. The next prime is 221427307. The reversal of 221427304 is 403724122.

It is a happy number.

221427304 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (221427307) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2487 + ... + 21190.

It is an arithmetic number, because the mean of its divisors is an integer number (14917140).

Almost surely, 2^221427304 is an apocalyptic number.

It is an amenable number.

221427304 is an abundant number, since it is smaller than the sum of its proper divisors (255921176).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221427304 is a wasteful number, since it uses less digits than its factorization.

221427304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23857 (or 23853 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 221427304 is about 14880.4335958332. The cubic root of 221427304 is about 604.9837702542.

The spelling of 221427304 in words is "two hundred twenty-one million, four hundred twenty-seven thousand, three hundred four".