1216332419 has 2 divisors, whose sum is σ = 1216332420. Its totient is φ = 1216332418.

The previous prime is 1216332409. The next prime is 1216332431. The reversal of 1216332419 is 9142336121.

It is a weak prime.

It is an emirp because it is prime and its reverse (9142336121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1216332419 - 2⁸ = 1216332163 is a prime.

It is a super-2 number, since 2×1216332419² = 2958929107020783122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1216332409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608166209 + 608166210.

It is an arithmetic number, because the mean of its divisors is an integer number (608166210).

Almost surely, 2^1216332419 is an apocalyptic number.

1216332419 is a deficient number, since it is larger than the sum of its proper divisors (1).

1216332419 is an equidigital number, since it uses as much as digits as its factorization.

1216332419 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 32.

The square root of 1216332419 is about 34875.9576069246. The cubic root of 1216332419 is about 1067.4579124044.

The spelling of 1216332419 in words is "one billion, two hundred sixteen million, three hundred thirty-two thousand, four hundred nineteen".