216477 has 12 divisors (see below), whose sum is σ = 318240. Its totient is φ = 141768.

The previous prime is 216451. The next prime is 216481. The reversal of 216477 is 774612.

It is not a de Polignac number, because 216477 - 2¹⁵ = 183709 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 216477.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 424 + ... + 782.

It is an arithmetic number, because the mean of its divisors is an integer number (26520).

2²¹⁶⁴⁷⁷ is an apocalyptic number.

It is an amenable number.

216477 is a deficient number, since it is larger than the sum of its proper divisors (101763).

216477 is a wasteful number, since it uses less digits than its factorization.

216477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432 (or 429 counting only the distinct ones).

The product of its digits is 2352, while the sum is 27.

The square root of 216477 is about 465.2708888379. The cubic root of 216477 is about 60.0441341949.

The spelling of 216477 in words is "two hundred sixteen thousand, four hundred seventy-seven".