30512219 has 2 divisors, whose sum is σ = 30512220. Its totient is φ = 30512218.

The previous prime is 30512197. The next prime is 30512221. The reversal of 30512219 is 91221503.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30512219 is a prime.

It is a super-2 number, since 2×30512219² = 1861991016607922, which contains 22 as substring.

Together with 30512221, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 30512194 and 30512203.

It is not a weakly prime, because it can be changed into another prime (30512239) 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, 15256109 + 15256110.

It is an arithmetic number, because the mean of its divisors is an integer number (15256110).

Almost surely, 2^30512219 is an apocalyptic number.

30512219 is a deficient number, since it is larger than the sum of its proper divisors (1).

30512219 is an equidigital number, since it uses as much as digits as its factorization.

30512219 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 30512219 is about 5523.7866540988. The cubic root of 30512219 is about 312.4817064491.

The spelling of 30512219 in words is "thirty million, five hundred twelve thousand, two hundred nineteen".