216206023 has 4 divisors (see below), whose sum is σ = 235861128. Its totient is φ = 196550920.

The previous prime is 216205981. The next prime is 216206047. The reversal of 216206023 is 320602612.

It is a happy number.

216206023 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 216206023 - 2⁹ = 216205511 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 216205985 and 216206003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216206083) 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, 9827536 + ... + 9827557.

It is an arithmetic number, because the mean of its divisors is an integer number (58965282).

Almost surely, 2^216206023 is an apocalyptic number.

216206023 is a deficient number, since it is larger than the sum of its proper divisors (19655105).

216206023 is a wasteful number, since it uses less digits than its factorization.

216206023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19655104.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 216206023 is about 14703.9458309666. The cubic root of 216206023 is about 600.1907014189.

Adding to 216206023 its reverse (320602612), we get a palindrome (536808635).

The spelling of 216206023 in words is "two hundred sixteen million, two hundred six thousand, twenty-three".