216749259 has 6 divisors (see below), whose sum is σ = 313082276. Its totient is φ = 144499500.

The previous prime is 216749251. The next prime is 216749279. The reversal of 216749259 is 952947612.

It is not a de Polignac number, because 216749259 - 2³ = 216749251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216749251) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12041617 + ... + 12041634.

Almost surely, 2^216749259 is an apocalyptic number.

216749259 is a deficient number, since it is larger than the sum of its proper divisors (96333017).

216749259 is a wasteful number, since it uses less digits than its factorization.

216749259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24083257 (or 24083254 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 216749259 is about 14722.4066986346. The cubic root of 216749259 is about 600.6929577079.

The spelling of 216749259 in words is "two hundred sixteen million, seven hundred forty-nine thousand, two hundred fifty-nine".