30331021 has 8 divisors (see below), whose sum is σ = 35509824. Its totient is φ = 25363680.

The previous prime is 30331019. The next prime is 30331033. The reversal of 30331021 is 12013303.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30331021 - 2¹ = 30331019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30330992 and 30331010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30331061) 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 7 ways as a sum of consecutive naturals, for example, 52555 + ... + 53128.

It is an arithmetic number, because the mean of its divisors is an integer number (4438728).

Almost surely, 2^30331021 is an apocalyptic number.

It is an amenable number.

30331021 is a deficient number, since it is larger than the sum of its proper divisors (5178803).

30331021 is a wasteful number, since it uses less digits than its factorization.

30331021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105731.

The product of its (nonzero) digits is 54, while the sum is 13.

The square root of 30331021 is about 5507.3606201156. The cubic root of 30331021 is about 311.8619163511.

Adding to 30331021 its reverse (12013303), we get a palindrome (42344324).

The spelling of 30331021 in words is "thirty million, three hundred thirty-one thousand, twenty-one".