219226379 has 2 divisors, whose sum is σ = 219226380. Its totient is φ = 219226378.

The previous prime is 219226367. The next prime is 219226393. The reversal of 219226379 is 973622912.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-219226379 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (219226309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109613189 + 109613190.

It is an arithmetic number, because the mean of its divisors is an integer number (109613190).

Almost surely, 2^219226379 is an apocalyptic number.

219226379 is a deficient number, since it is larger than the sum of its proper divisors (1).

219226379 is an equidigital number, since it uses as much as digits as its factorization.

219226379 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 41.

The square root of 219226379 is about 14806.2952489811. The cubic root of 219226379 is about 602.9726360325.

The spelling of 219226379 in words is "two hundred nineteen million, two hundred twenty-six thousand, three hundred seventy-nine".