30543021 has 8 divisors (see below), whose sum is σ = 45248960. Its totient is φ = 20361996.

The previous prime is 30543017. The next prime is 30543031. The reversal of 30543021 is 12034503.

It is not a de Polignac number, because 30543021 - 2² = 30543017 is a prime.

It is a super-2 number, since 2×30543021² = 1865752263612882, 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 = 30542985 and 30543003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30543031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 565585 + ... + 565638.

It is an arithmetic number, because the mean of its divisors is an integer number (5656120).

Almost surely, 2^30543021 is an apocalyptic number.

It is an amenable number.

30543021 is a deficient number, since it is larger than the sum of its proper divisors (14705939).

30543021 is a wasteful number, since it uses less digits than its factorization.

30543021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1131232 (or 1131226 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 30543021 is about 5526.5740744154. The cubic root of 30543021 is about 312.5868208899.

Adding to 30543021 its reverse (12034503), we get a palindrome (42577524).

The spelling of 30543021 in words is "thirty million, five hundred forty-three thousand, twenty-one".