30447221 has 8 divisors (see below), whose sum is σ = 36843840. Its totient is φ = 24562368.

The previous prime is 30447203. The next prime is 30447223. The reversal of 30447221 is 12274403.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30447221 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 (30447223) 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 7 ways as a sum of consecutive naturals, for example, 127811 + ... + 128048.

It is an arithmetic number, because the mean of its divisors is an integer number (4605480).

Almost surely, 2^30447221 is an apocalyptic number.

It is an amenable number.

30447221 is a deficient number, since it is larger than the sum of its proper divisors (6396619).

30447221 is a wasteful number, since it uses less digits than its factorization.

30447221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255883.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 30447221 is about 5517.9000534624. The cubic root of 30447221 is about 312.2596628892.

The spelling of 30447221 in words is "thirty million, four hundred forty-seven thousand, two hundred twenty-one".