216952807 has 2 divisors, whose sum is σ = 216952808. Its totient is φ = 216952806.

The previous prime is 216952777. The next prime is 216952817. The reversal of 216952807 is 708259612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 216952807 - 2⁷ = 216952679 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 216952807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216952817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108476403 + 108476404.

It is an arithmetic number, because the mean of its divisors is an integer number (108476404).

Almost surely, 2^216952807 is an apocalyptic number.

216952807 is a deficient number, since it is larger than the sum of its proper divisors (1).

216952807 is an equidigital number, since it uses as much as digits as its factorization.

216952807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 216952807 is about 14729.3179407602. The cubic root of 216952807 is about 600.8809346609.

The spelling of 216952807 in words is "two hundred sixteen million, nine hundred fifty-two thousand, eight hundred seven".