216919463 has 8 divisors (see below), whose sum is σ = 226538208. Its totient is φ = 207316384.

The previous prime is 216919441. The next prime is 216919489. The reversal of 216919463 is 364919612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 216919463 - 2⁶ = 216919399 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 216919463.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216919403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31181 + ... + 37497.

It is an arithmetic number, because the mean of its divisors is an integer number (28317276).

Almost surely, 2^216919463 is an apocalyptic number.

216919463 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

216919463 is a deficient number, since it is larger than the sum of its proper divisors (9618745).

216919463 is a wasteful number, since it uses less digits than its factorization.

216919463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7833.

The product of its digits is 69984, while the sum is 41.

The square root of 216919463 is about 14728.1860050720. The cubic root of 216919463 is about 600.8501494705.

The spelling of 216919463 in words is "two hundred sixteen million, nine hundred nineteen thousand, four hundred sixty-three".