30421002431 has 4 divisors (see below), whose sum is σ = 30548287200. Its totient is φ = 30293717664.

The previous prime is 30421002421. The next prime is 30421002457. The reversal of 30421002431 is 13420012403.

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-30421002431 is a prime.

It is a super-2 number, since 2×30421002431² (a number of 22 digits) 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 (30421002421) 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, 63642026 + ... + 63642503.

It is an arithmetic number, because the mean of its divisors is an integer number (7637071800).

Almost surely, 2^30421002431 is an apocalyptic number.

30421002431 is a deficient number, since it is larger than the sum of its proper divisors (127284769).

30421002431 is a wasteful number, since it uses less digits than its factorization.

30421002431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127284768.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 30421002431 its reverse (13420012403), we get a palindrome (43841014834).

The spelling of 30421002431 in words is "thirty billion, four hundred twenty-one million, two thousand, four hundred thirty-one".