30221320 has 32 divisors (see below), whose sum is σ = 68707800. Its totient is φ = 11962368.

The previous prime is 30221281. The next prime is 30221351. The reversal of 30221320 is 2312203.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 24661156 + 5560164 = 4966^2 + 2358^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 30221320.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15 + ... + 7774.

Almost surely, 2^30221320 is an apocalyptic number.

It is an amenable number.

30221320 is an abundant number, since it is smaller than the sum of its proper divisors (38486480).

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

30221320 is a wasteful number, since it uses less digits than its factorization.

30221320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7897 (or 7893 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 30221320 is about 5497.3921089913. The cubic root of 30221320 is about 311.4854822427.

Adding to 30221320 its reverse (2312203), we get a palindrome (32533523).

The spelling of 30221320 in words is "thirty million, two hundred twenty-one thousand, three hundred twenty".