216207023 has 4 divisors (see below), whose sum is σ = 227586360. Its totient is φ = 204827688.

The previous prime is 216207011. The next prime is 216207029. The reversal of 216207023 is 320702612.

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 216207023 - 2¹² = 216202927 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 216207023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216207029) 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, 5689640 + ... + 5689677.

It is an arithmetic number, because the mean of its divisors is an integer number (56896590).

Almost surely, 2^216207023 is an apocalyptic number.

216207023 is a deficient number, since it is larger than the sum of its proper divisors (11379337).

216207023 is a wasteful number, since it uses less digits than its factorization.

216207023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11379336.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 216207023 is about 14703.9798354051. The cubic root of 216207023 is about 600.1916267551.

Adding to 216207023 its reverse (320702612), we get a palindrome (536909635).

The spelling of 216207023 in words is "two hundred sixteen million, two hundred seven thousand, twenty-three".