30280231 has 4 divisors (see below), whose sum is σ = 30295152. Its totient is φ = 30265312.

The previous prime is 30280223. The next prime is 30280241. The reversal of 30280231 is 13208203.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 30280231 - 2³ = 30280223 is a prime.

It is a super-2 number, since 2×30280231² = 1833784778826722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30280199 and 30280208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30280241) 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, 3826 + ... + 8671.

It is an arithmetic number, because the mean of its divisors is an integer number (7573788).

Almost surely, 2^30280231 is an apocalyptic number.

30280231 is a deficient number, since it is larger than the sum of its proper divisors (14921).

30280231 is a wasteful number, since it uses less digits than its factorization.

30280231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14920.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 30280231 is about 5502.7475864335. The cubic root of 30280231 is about 311.6877457536.

Adding to 30280231 its reverse (13208203), we get a palindrome (43488434).

The spelling of 30280231 in words is "thirty million, two hundred eighty thousand, two hundred thirty-one".