219012239 has 2 divisors, whose sum is σ = 219012240. Its totient is φ = 219012238.

The previous prime is 219012229. The next prime is 219012247. The reversal of 219012239 is 932210912.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-219012239 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (219012229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109506119 + 109506120.

It is an arithmetic number, because the mean of its divisors is an integer number (109506120).

Almost surely, 2^219012239 is an apocalyptic number.

219012239 is a deficient number, since it is larger than the sum of its proper divisors (1).

219012239 is an equidigital number, since it uses as much as digits as its factorization.

219012239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 219012239 is about 14799.0620986602. The cubic root of 219012239 is about 602.7762444832.

The spelling of 219012239 in words is "two hundred nineteen million, twelve thousand, two hundred thirty-nine".