216849523 has 8 divisors (see below), whose sum is σ = 237766320. Its totient is φ = 196133280.

The previous prime is 216849511. The next prime is 216849539. The reversal of 216849523 is 325948612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 216849523 - 2²¹ = 214752371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216849583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47868 + ... + 52201.

It is an arithmetic number, because the mean of its divisors is an integer number (29720790).

Almost surely, 2^216849523 is an apocalyptic number.

216849523 is a deficient number, since it is larger than the sum of its proper divisors (20916797).

216849523 is a wasteful number, since it uses less digits than its factorization.

216849523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100277.

The product of its digits is 103680, while the sum is 40.

The square root of 216849523 is about 14725.8114547213. The cubic root of 216849523 is about 600.7855663972.

The spelling of 216849523 in words is "two hundred sixteen million, eight hundred forty-nine thousand, five hundred twenty-three".