30222521 has 16 divisors (see below), whose sum is σ = 36556800. Its totient is φ = 24407568.

The previous prime is 30222473. The next prime is 30222547. The reversal of 30222521 is 12522203.

It is a cyclic number.

It is not a de Polignac number, because 30222521 - 2²² = 26028217 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 30222521.

It is not an unprimeable number, because it can be changed into a prime (30222221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29150 + ... + 30168.

It is an arithmetic number, because the mean of its divisors is an integer number (2284800).

Almost surely, 2^30222521 is an apocalyptic number.

It is an amenable number.

30222521 is a deficient number, since it is larger than the sum of its proper divisors (6334279).

30222521 is a wasteful number, since it uses less digits than its factorization.

30222521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1268.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 30222521 is about 5497.5013415187. The cubic root of 30222521 is about 311.4896083487.

Adding to 30222521 its reverse (12522203), we get a palindrome (42744724).

The spelling of 30222521 in words is "thirty million, two hundred twenty-two thousand, five hundred twenty-one".