216887467 has 2 divisors, whose sum is σ = 216887468. Its totient is φ = 216887466.

The previous prime is 216887459. The next prime is 216887477. The reversal of 216887467 is 764788612.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216887467 - 2³ = 216887459 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 216887467.

It is not a weakly prime, because it can be changed into another prime (216887477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108443733 + 108443734.

It is an arithmetic number, because the mean of its divisors is an integer number (108443734).

Almost surely, 2^216887467 is an apocalyptic number.

216887467 is a deficient number, since it is larger than the sum of its proper divisors (1).

216887467 is an equidigital number, since it uses as much as digits as its factorization.

216887467 is an evil number, because the sum of its binary digits is even.

The product of its digits is 903168, while the sum is 49.

The square root of 216887467 is about 14727.0997484230. The cubic root of 216887467 is about 600.8206058687.

The spelling of 216887467 in words is "two hundred sixteen million, eight hundred eighty-seven thousand, four hundred sixty-seven".