221722652 has 12 divisors (see below), whose sum is σ = 388647840. Its totient is φ = 110680416.

The previous prime is 221722643. The next prime is 221722693. The reversal of 221722652 is 256227122.

221722652 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent 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, 42452 + ... + 47387.

It is an arithmetic number, because the mean of its divisors is an integer number (32387320).

Almost surely, 2^221722652 is an apocalyptic number.

It is an amenable number.

221722652 is a deficient number, since it is larger than the sum of its proper divisors (166925188).

221722652 is a wasteful number, since it uses less digits than its factorization.

221722652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90460 (or 90458 counting only the distinct ones).

The product of its digits is 6720, while the sum is 29.

The square root of 221722652 is about 14890.3543275504. The cubic root of 221722652 is about 605.2526340581.

Adding to 221722652 its reverse (256227122), we get a palindrome (477949774).

The spelling of 221722652 in words is "two hundred twenty-one million, seven hundred twenty-two thousand, six hundred fifty-two".