221792930 has 16 divisors (see below), whose sum is σ = 399777984. Its totient is φ = 88594800.

The previous prime is 221792881. The next prime is 221792939. The reversal of 221792930 is 39297122.

It is not an unprimeable number, because it can be changed into a prime (221792939) 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, 7496 + ... + 22355.

It is an arithmetic number, because the mean of its divisors is an integer number (24986124).

Almost surely, 2^221792930 is an apocalyptic number.

221792930 is a deficient number, since it is larger than the sum of its proper divisors (177985054).

221792930 is a wasteful number, since it uses less digits than its factorization.

221792930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30601.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 221792930 is about 14892.7139904048. The cubic root of 221792930 is about 605.3165749785.

The spelling of 221792930 in words is "two hundred twenty-one million, seven hundred ninety-two thousand, nine hundred thirty".