30183221 has 2 divisors, whose sum is σ = 30183222. Its totient is φ = 30183220.

The previous prime is 30183217. The next prime is 30183233. The reversal of 30183221 is 12238103.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30096196 + 87025 = 5486^2 + 295^2 .

It is an emirp because it is prime and its reverse (12238103) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30183221 - 2² = 30183217 is a prime.

It is a super-2 number, since 2×30183221² = 1822053659869682, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 30183193 and 30183202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30183271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15091610 + 15091611.

It is an arithmetic number, because the mean of its divisors is an integer number (15091611).

Almost surely, 2^30183221 is an apocalyptic number.

It is an amenable number.

30183221 is a deficient number, since it is larger than the sum of its proper divisors (1).

30183221 is an equidigital number, since it uses as much as digits as its factorization.

30183221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 30183221 is about 5493.9258276755. The cubic root of 30183221 is about 311.3545341154.

The spelling of 30183221 in words is "thirty million, one hundred eighty-three thousand, two hundred twenty-one".