216467 has 4 divisors (see below), whose sum is σ = 227880. Its totient is φ = 205056.

The previous prime is 216451. The next prime is 216481. The reversal of 216467 is 764612.

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 216467 - 2⁴ = 216451 is a prime.

It is a super-4 number, since 4×216467⁴ (a number of 22 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216967) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5678 + ... + 5715.

It is an arithmetic number, because the mean of its divisors is an integer number (56970).

2²¹⁶⁴⁶⁷ is an apocalyptic number.

216467 is a deficient number, since it is larger than the sum of its proper divisors (11413).

216467 is a wasteful number, since it uses less digits than its factorization.

216467 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11412.

The product of its digits is 2016, while the sum is 26.

The square root of 216467 is about 465.2601422860. The cubic root of 216467 is about 60.0432096154.

The spelling of 216467 in words is "two hundred sixteen thousand, four hundred sixty-seven".