1216230667 has 2 divisors, whose sum is σ = 1216230668. Its totient is φ = 1216230666.

The previous prime is 1216230637. The next prime is 1216230709. The reversal of 1216230667 is 7660326121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1216230667 is a prime.

It is not a weakly prime, because it can be changed into another prime (1216230607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608115333 + 608115334.

It is an arithmetic number, because the mean of its divisors is an integer number (608115334).

Almost surely, 2^1216230667 is an apocalyptic number.

1216230667 is a deficient number, since it is larger than the sum of its proper divisors (1).

1216230667 is an equidigital number, since it uses as much as digits as its factorization.

1216230667 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 1216230667 is about 34874.4988064345. The cubic root of 1216230667 is about 1067.4281455949.

Adding to 1216230667 its reverse (7660326121), we get a palindrome (8876556788).

The spelling of 1216230667 in words is "one billion, two hundred sixteen million, two hundred thirty thousand, six hundred sixty-seven".