30344021 has 4 divisors (see below), whose sum is σ = 30355500. Its totient is φ = 30332544.

The previous prime is 30343991. The next prime is 30344029. The reversal of 30344021 is 12044303.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 12044303 = 53 ⋅227251.

It can be written as a sum of positive squares in 2 ways, for example, as 18879025 + 11464996 = 4345^2 + 3386^2 .

It is a cyclic number.

It is not a de Polignac number, because 30344021 - 2¹⁴ = 30327637 is a prime.

It is a super-2 number, since 2×30344021² = 1841519220896882, 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 (30344029) 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, 455 + ... + 7803.

It is an arithmetic number, because the mean of its divisors is an integer number (7588875).

Almost surely, 2^30344021 is an apocalyptic number.

It is an amenable number.

30344021 is a deficient number, since it is larger than the sum of its proper divisors (11479).

30344021 is an equidigital number, since it uses as much as digits as its factorization.

30344021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11478.

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

The square root of 30344021 is about 5508.5407323537. The cubic root of 30344021 is about 311.9064650859.

Adding to 30344021 its reverse (12044303), we get a palindrome (42388324).

The spelling of 30344021 in words is "thirty million, three hundred forty-four thousand, twenty-one".