30221552 has 40 divisors (see below), whose sum is σ = 62384400. Its totient is φ = 14141952.

The previous prime is 30221549. The next prime is 30221557. The reversal of 30221552 is 25512203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30221557) 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, 26498 + ... + 27614.

It is an arithmetic number, because the mean of its divisors is an integer number (1559610).

Almost surely, 2^30221552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30221552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31192200).

30221552 is an abundant number, since it is smaller than the sum of its proper divisors (32162848).

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

30221552 is a wasteful number, since it uses less digits than its factorization.

30221552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1233 (or 1227 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 30221552 is about 5497.4132098652. The cubic root of 30221552 is about 311.4862793009.

Adding to 30221552 its reverse (25512203), we get a palindrome (55733755).

The spelling of 30221552 in words is "thirty million, two hundred twenty-one thousand, five hundred fifty-two".