30440231 has 4 divisors (see below), whose sum is σ = 30457200. Its totient is φ = 30423264.

The previous prime is 30440213. The next prime is 30440239. The reversal of 30440231 is 13204403.

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 30440231 - 2¹⁰ = 30439207 is a prime.

It is a super-2 number, since 2×30440231² = 1853215326666722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30440239) 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, 5426 + ... + 9503.

It is an arithmetic number, because the mean of its divisors is an integer number (7614300).

Almost surely, 2^30440231 is an apocalyptic number.

30440231 is a deficient number, since it is larger than the sum of its proper divisors (16969).

30440231 is a wasteful number, since it uses less digits than its factorization.

30440231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16968.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 30440231 is about 5517.2666239724. The cubic root of 30440231 is about 312.2357651187.

Adding to 30440231 its reverse (13204403), we get a palindrome (43644634).

The spelling of 30440231 in words is "thirty million, four hundred forty thousand, two hundred thirty-one".