216047 has 4 divisors (see below), whose sum is σ = 232680. Its totient is φ = 199416.

The previous prime is 216037. The next prime is 216061. The reversal of 216047 is 740612.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 216047 - 2⁶ = 215983 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 216047.

It is not an unprimeable number, because it can be changed into a prime (216037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8297 + ... + 8322.

It is an arithmetic number, because the mean of its divisors is an integer number (58170).

216047 is a Friedman number, since it can be written as 60^(2+1)+47, using all its digits and the basic arithmetic operations.

2²¹⁶⁰⁴⁷ is an apocalyptic number.

216047 is a deficient number, since it is larger than the sum of its proper divisors (16633).

216047 is a wasteful number, since it uses less digits than its factorization.

216047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16632.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 216047 is about 464.8085627438. The cubic root of 216047 is about 60.0043515362.

Adding to 216047 its reverse (740612), we get a palindrome (956659).

The spelling of 216047 in words is "two hundred sixteen thousand, forty-seven".