30212219 has 2 divisors, whose sum is σ = 30212220. Its totient is φ = 30212218.

The previous prime is 30212209. The next prime is 30212227. The reversal of 30212219 is 91221203.

It is a strong prime.

It is an emirp because it is prime and its reverse (91221203) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30212219 - 2⁸ = 30211963 is a prime.

It is a super-2 number, since 2×30212219² = 1825556353807922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30212219.

It is not a weakly prime, because it can be changed into another prime (30212209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15106109 + 15106110.

It is an arithmetic number, because the mean of its divisors is an integer number (15106110).

Almost surely, 2^30212219 is an apocalyptic number.

30212219 is a deficient number, since it is larger than the sum of its proper divisors (1).

30212219 is an equidigital number, since it uses as much as digits as its factorization.

30212219 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 30212219 is about 5496.5642905364. The cubic root of 30212219 is about 311.4542116697.

It can be divided in two parts, 302 and 12219, that added together give a palindrome (12521).

The spelling of 30212219 in words is "thirty million, two hundred twelve thousand, two hundred nineteen".