216776467 has 2 divisors, whose sum is σ = 216776468. Its totient is φ = 216776466.

The previous prime is 216776447. The next prime is 216776501. The reversal of 216776467 is 764677612.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216776467 is a prime.

It is not a weakly prime, because it can be changed into another prime (216776407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108388233 + 108388234.

It is an arithmetic number, because the mean of its divisors is an integer number (108388234).

Almost surely, 2^216776467 is an apocalyptic number.

216776467 is a deficient number, since it is larger than the sum of its proper divisors (1).

216776467 is an equidigital number, since it uses as much as digits as its factorization.

216776467 is an evil number, because the sum of its binary digits is even.

The product of its digits is 592704, while the sum is 46.

The square root of 216776467 is about 14723.3307033429. The cubic root of 216776467 is about 600.7180911582.

The spelling of 216776467 in words is "two hundred sixteen million, seven hundred seventy-six thousand, four hundred sixty-seven".