30442231 has 4 divisors (see below), whose sum is σ = 31265032. Its totient is φ = 29619432.

The previous prime is 30442219. The next prime is 30442259. The reversal of 30442231 is 13224403.

30442231 = 889² + 890² + ... + 925².

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13224403 = 181 ⋅73063.

It is a cyclic number.

It is not a de Polignac number, because 30442231 - 2⁷ = 30442103 is a prime.

It is a super-2 number, since 2×30442231² = 1853458856514722, 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 = 30442199 and 30442208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30442201) 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 3 ways as a sum of consecutive naturals, for example, 411345 + ... + 411418.

It is an arithmetic number, because the mean of its divisors is an integer number (7816258).

Almost surely, 2^30442231 is an apocalyptic number.

30442231 is the 3186-th hex number.

30442231 is a deficient number, since it is larger than the sum of its proper divisors (822801).

30442231 is an equidigital number, since it uses as much as digits as its factorization.

30442231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 822800.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 30442231 is about 5517.4478701661. The cubic root of 30442231 is about 312.2426031949.

Adding to 30442231 its reverse (13224403), we get a palindrome (43666634).

The spelling of 30442231 in words is "thirty million, four hundred forty-two thousand, two hundred thirty-one".