216841329 has 12 divisors (see below), whose sum is σ = 314226432. Its totient is φ = 144094200.

The previous prime is 216841327. The next prime is 216841337. The reversal of 216841329 is 923148612.

216841329 is a `hidden beast` number, since 216 + 8 + 413 + 29 = 666.

It is not a de Polignac number, because 216841329 - 2¹ = 216841327 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 216841293 and 216841302.

It is not an unprimeable number, because it can be changed into a prime (216841321) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35937 + ... + 41534.

It is an arithmetic number, because the mean of its divisors is an integer number (26185536).

Almost surely, 2^216841329 is an apocalyptic number.

It is an amenable number.

216841329 is a deficient number, since it is larger than the sum of its proper divisors (97385103).

216841329 is a wasteful number, since it uses less digits than its factorization.

216841329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77788 (or 77785 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 216841329 is about 14725.5332331295. The cubic root of 216841329 is about 600.7779990930. Note that the first 3 decimals are identical.

The spelling of 216841329 in words is "two hundred sixteen million, eight hundred forty-one thousand, three hundred twenty-nine".