30205223 has 4 divisors (see below), whose sum is σ = 30225888. Its totient is φ = 30184560.

The previous prime is 30205213. The next prime is 30205229. The reversal of 30205223 is 32250203.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32250203 = 1087 ⋅29669.

It is a cyclic number.

It is not a de Polignac number, because 30205223 - 2¹⁶ = 30139687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30205229) 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, 7958 + ... + 11123.

It is an arithmetic number, because the mean of its divisors is an integer number (7556472).

Almost surely, 2^30205223 is an apocalyptic number.

30205223 is a deficient number, since it is larger than the sum of its proper divisors (20665).

30205223 is a wasteful number, since it uses less digits than its factorization.

30205223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20664.

The product of its (nonzero) digits is 360, while the sum is 17.

The square root of 30205223 is about 5495.9278561495. The cubic root of 30205223 is about 311.4301695001.

Adding to 30205223 its reverse (32250203), we get a palindrome (62455426).

The spelling of 30205223 in words is "thirty million, two hundred five thousand, two hundred twenty-three".