30534921 has 32 divisors (see below), whose sum is σ = 46569600. Its totient is φ = 19768320.

The previous prime is 30534887. The next prime is 30534937. The reversal of 30534921 is 12943503.

It is not a de Polignac number, because 30534921 - 2⁶ = 30534857 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (30534821) 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 31 ways as a sum of consecutive naturals, for example, 233026 + ... + 233156.

It is an arithmetic number, because the mean of its divisors is an integer number (1455300).

Almost surely, 2^30534921 is an apocalyptic number.

It is an amenable number.

30534921 is a deficient number, since it is larger than the sum of its proper divisors (16034679).

30534921 is a wasteful number, since it uses less digits than its factorization.

30534921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326 (or 320 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 30534921 is about 5525.8412029301. The cubic root of 30534921 is about 312.5591858032.

The spelling of 30534921 in words is "thirty million, five hundred thirty-four thousand, nine hundred twenty-one".