30221632 has 84 divisors (see below), whose sum is σ = 72969120. Its totient is φ = 12359424.

The previous prime is 30221627. The next prime is 30221663. The reversal of 30221632 is 23612203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71919 + ... + 72337.

It is an arithmetic number, because the mean of its divisors is an integer number (868680).

Almost surely, 2^30221632 is an apocalyptic number.

30221632 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30221632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36484560).

30221632 is an abundant number, since it is smaller than the sum of its proper divisors (42747488).

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

30221632 is a wasteful number, since it uses less digits than its factorization.

30221632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468 (or 451 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 30221632 is about 5497.4204860098. The cubic root of 30221632 is about 311.4865541476.

Adding to 30221632 its reverse (23612203), we get a palindrome (53833835).

The spelling of 30221632 in words is "thirty million, two hundred twenty-one thousand, six hundred thirty-two".