30845221 has 4 divisors (see below), whose sum is σ = 33649344. Its totient is φ = 28041100.

The previous prime is 30845219. The next prime is 30845251. The reversal of 30845221 is 12254803.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 30845221 - 2¹ = 30845219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30845251) 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, 1402045 + ... + 1402066.

It is an arithmetic number, because the mean of its divisors is an integer number (8412336).

Almost surely, 2^30845221 is an apocalyptic number.

It is an amenable number.

30845221 is a deficient number, since it is larger than the sum of its proper divisors (2804123).

30845221 is a wasteful number, since it uses less digits than its factorization.

30845221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2804122.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 30845221 is about 5553.8474051778. The cubic root of 30845221 is about 313.6143757564.

The spelling of 30845221 in words is "thirty million, eight hundred forty-five thousand, two hundred twenty-one".