221022552 has 16 divisors (see below), whose sum is σ = 552556440. Its totient is φ = 73674176.

The previous prime is 221022547. The next prime is 221022553. The reversal of 221022552 is 255220122.

221022552 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221022553) 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, 4604613 + ... + 4604660.

Almost surely, 2^221022552 is an apocalyptic number.

It is an amenable number.

221022552 is an abundant number, since it is smaller than the sum of its proper divisors (331533888).

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

221022552 is a wasteful number, since it uses less digits than its factorization.

221022552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9209282 (or 9209278 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 221022552 is about 14866.8272338115. The cubic root of 221022552 is about 604.6149242291.

Adding to 221022552 its reverse (255220122), we get a palindrome (476242674).

The spelling of 221022552 in words is "two hundred twenty-one million, twenty-two thousand, five hundred fifty-two".