30343021 has 4 divisors (see below), whose sum is σ = 30510844. Its totient is φ = 30175200.

The previous prime is 30342979. The next prime is 30343043. The reversal of 30343021 is 12034303.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12034303 = 47 ⋅256049.

It can be written as a sum of positive squares in 2 ways, for example, as 2937796 + 27405225 = 1714^2 + 5235^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30343021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30342986 and 30343004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30343081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83640 + ... + 84001.

It is an arithmetic number, because the mean of its divisors is an integer number (7627711).

Almost surely, 2^30343021 is an apocalyptic number.

It is an amenable number.

30343021 is a deficient number, since it is larger than the sum of its proper divisors (167823).

30343021 is a wasteful number, since it uses less digits than its factorization.

30343021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167822.

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 30343021 is about 5508.4499634652. The cubic root of 30343021 is about 311.9030387119.

Adding to 30343021 its reverse (12034303), we get a palindrome (42377324).

It can be divided in two parts, 3034302 and 1, that added together give a palindrome (3034303).

The spelling of 30343021 in words is "thirty million, three hundred forty-three thousand, twenty-one".