221725572 has 24 divisors (see below), whose sum is σ = 521085600. Its totient is φ = 73376256.

The previous prime is 221725523. The next prime is 221725583. The reversal of 221725572 is 275527122.

221725572 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64797 + ... + 68132.

It is an arithmetic number, because the mean of its divisors is an integer number (21711900).

Almost surely, 2^221725572 is an apocalyptic number.

It is an amenable number.

221725572 is an abundant number, since it is smaller than the sum of its proper divisors (299360028).

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

221725572 is a wasteful number, since it uses less digits than its factorization.

221725572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133075 (or 133073 counting only the distinct ones).

The product of its digits is 19600, while the sum is 33.

The square root of 221725572 is about 14890.4523772785. The cubic root of 221725572 is about 605.2552910261.

The spelling of 221725572 in words is "two hundred twenty-one million, seven hundred twenty-five thousand, five hundred seventy-two".