30221390 has 16 divisors (see below), whose sum is σ = 54486432. Its totient is φ = 12069024.

The previous prime is 30221369. The next prime is 30221431. The reversal of 30221390 is 9312203.

It is a congruent number.

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, 5192 + ... + 9348.

It is an arithmetic number, because the mean of its divisors is an integer number (3405402).

Almost surely, 2^30221390 is an apocalyptic number.

30221390 is a deficient number, since it is larger than the sum of its proper divisors (24265042).

30221390 is a wasteful number, since it uses less digits than its factorization.

30221390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4891.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 30221390 is about 5497.3984756428. The cubic root of 30221390 is about 311.4857227348.

Adding to 30221390 its reverse (9312203), we get a palindrome (39533593).

The spelling of 30221390 in words is "thirty million, two hundred twenty-one thousand, three hundred ninety".