30194221 has 2 divisors, whose sum is σ = 30194222. Its totient is φ = 30194220.

The previous prime is 30194161. The next prime is 30194231. The reversal of 30194221 is 12249103.

30194221 = 3885² + 3886².

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15100996 + 15093225 = 3886^2 + 3885^2 .

It is an emirp because it is prime and its reverse (12249103) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30194221 - 2¹⁹ = 29669933 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30194192 and 30194201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30194231) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15097110 + 15097111.

It is an arithmetic number, because the mean of its divisors is an integer number (15097111).

Almost surely, 2^30194221 is an apocalyptic number.

30194221 is the 3886-th centered square number.

It is an amenable number.

30194221 is a deficient number, since it is larger than the sum of its proper divisors (1).

30194221 is an equidigital number, since it uses as much as digits as its factorization.

30194221 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 22.

The square root of 30194221 is about 5494.9268420972. The cubic root of 30194221 is about 311.3923529630.

The spelling of 30194221 in words is "thirty million, one hundred ninety-four thousand, two hundred twenty-one".