30263221 has 2 divisors, whose sum is σ = 30263222. Its totient is φ = 30263220.

The previous prime is 30263209. The next prime is 30263237. The reversal of 30263221 is 12236203.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20566225 + 9696996 = 4535^2 + 3114^2 .

It is a cyclic number.

It is not a de Polignac number, because 30263221 - 2⁹ = 30262709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30263201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15131610 + 15131611.

It is an arithmetic number, because the mean of its divisors is an integer number (15131611).

Almost surely, 2^30263221 is an apocalyptic number.

It is an amenable number.

30263221 is a deficient number, since it is larger than the sum of its proper divisors (1).

30263221 is an equidigital number, since it uses as much as digits as its factorization.

30263221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 30263221 is about 5501.2017777936. The cubic root of 30263221 is about 311.6293710158.

Adding to 30263221 its reverse (12236203), we get a palindrome (42499424).

The spelling of 30263221 in words is "thirty million, two hundred sixty-three thousand, two hundred twenty-one".