30221023 has 4 divisors (see below), whose sum is σ = 34538320. Its totient is φ = 25903728.

The previous prime is 30221003. The next prime is 30221033. The reversal of 30221023 is 32012203.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30221023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30220994 and 30221012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30221003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2158638 + ... + 2158651.

It is an arithmetic number, because the mean of its divisors is an integer number (8634580).

Almost surely, 2^30221023 is an apocalyptic number.

30221023 is a deficient number, since it is larger than the sum of its proper divisors (4317297).

30221023 is an equidigital number, since it uses as much as digits as its factorization.

30221023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4317296.

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

The square root of 30221023 is about 5497.3650961165. The cubic root of 30221023 is about 311.4844618649.

Adding to 30221023 its reverse (32012203), we get a palindrome (62233226).

The spelling of 30221023 in words is "thirty million, two hundred twenty-one thousand, twenty-three".