30479221 has 2 divisors, whose sum is σ = 30479222. Its totient is φ = 30479220.

The previous prime is 30479159. The next prime is 30479257. The reversal of 30479221 is 12297403.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28196100 + 2283121 = 5310^2 + 1511^2 .

It is a cyclic number.

It is not a de Polignac number, because 30479221 - 2⁹ = 30478709 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30479221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30479621) 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 as a sum of consecutive naturals, namely, 15239610 + 15239611.

It is an arithmetic number, because the mean of its divisors is an integer number (15239611).

Almost surely, 2^30479221 is an apocalyptic number.

It is an amenable number.

30479221 is a deficient number, since it is larger than the sum of its proper divisors (1).

30479221 is an equidigital number, since it uses as much as digits as its factorization.

30479221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 30479221 is about 5520.7989458049. The cubic root of 30479221 is about 312.3690194554.

The spelling of 30479221 in words is "thirty million, four hundred seventy-nine thousand, two hundred twenty-one".