216854047 has 2 divisors, whose sum is σ = 216854048. Its totient is φ = 216854046.

The previous prime is 216854041. The next prime is 216854063. The reversal of 216854047 is 740458612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216854047 - 2¹⁹ = 216329759 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 216853997 and 216854015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216854041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108427023 + 108427024.

It is an arithmetic number, because the mean of its divisors is an integer number (108427024).

Almost surely, 2^216854047 is an apocalyptic number.

216854047 is a deficient number, since it is larger than the sum of its proper divisors (1).

216854047 is an equidigital number, since it uses as much as digits as its factorization.

216854047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 216854047 is about 14725.9650617540. The cubic root of 216854047 is about 600.7897443097.

The spelling of 216854047 in words is "two hundred sixteen million, eight hundred fifty-four thousand, forty-seven".