216323575 has 24 divisors (see below), whose sum is σ = 291137616. Its totient is φ = 158496000.

The previous prime is 216323573. The next prime is 216323599. The reversal of 216323575 is 575323612.

It is not a de Polignac number, because 216323575 - 2¹ = 216323573 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 216323575.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216323573) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40035 + ... + 45115.

It is an arithmetic number, because the mean of its divisors is an integer number (12130734).

Almost surely, 2^216323575 is an apocalyptic number.

216323575 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

216323575 is a deficient number, since it is larger than the sum of its proper divisors (74814041).

216323575 is a wasteful number, since it uses less digits than its factorization.

216323575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5235 (or 5230 counting only the distinct ones).

The product of its digits is 37800, while the sum is 34.

The square root of 216323575 is about 14707.9425821561. The cubic root of 216323575 is about 600.2994569991.

The spelling of 216323575 in words is "two hundred sixteen million, three hundred twenty-three thousand, five hundred seventy-five".