216513967 has 2 divisors, whose sum is σ = 216513968. Its totient is φ = 216513966.

The previous prime is 216513959. The next prime is 216514009. The reversal of 216513967 is 769315612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216513967 - 2³ = 216513959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216513937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108256983 + 108256984.

It is an arithmetic number, because the mean of its divisors is an integer number (108256984).

Almost surely, 2^216513967 is an apocalyptic number.

216513967 is a deficient number, since it is larger than the sum of its proper divisors (1).

216513967 is an equidigital number, since it uses as much as digits as its factorization.

216513967 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68040, while the sum is 40.

The square root of 216513967 is about 14714.4135798883. The cubic root of 216513967 is about 600.4755184079.

The spelling of 216513967 in words is "two hundred sixteen million, five hundred thirteen thousand, nine hundred sixty-seven".