216814461 has 8 divisors (see below), whose sum is σ = 289221504. Its totient is φ = 144475200.

The previous prime is 216814459. The next prime is 216814501. The reversal of 216814461 is 164418612.

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

It is not a de Polignac number, because 216814461 - 2¹ = 216814459 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216812461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8940 + ... + 22661.

It is an arithmetic number, because the mean of its divisors is an integer number (36152688).

Almost surely, 2^216814461 is an apocalyptic number.

It is an amenable number.

216814461 is a deficient number, since it is larger than the sum of its proper divisors (72407043).

216814461 is a wasteful number, since it uses less digits than its factorization.

216814461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33891.

The product of its digits is 9216, while the sum is 33.

The square root of 216814461 is about 14724.6209119284. The cubic root of 216814461 is about 600.7531846813.

The spelling of 216814461 in words is "two hundred sixteen million, eight hundred fourteen thousand, four hundred sixty-one".