216516498 has 64 divisors (see below), whose sum is σ = 486162432. Its totient is φ = 63722880.

The previous prime is 216516491. The next prime is 216516529. The reversal of 216516498 is 894615612.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (216516491) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 691590 + ... + 691902.

It is an arithmetic number, because the mean of its divisors is an integer number (7596288).

Almost surely, 2^216516498 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216516498, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (243081216).

216516498 is an abundant number, since it is smaller than the sum of its proper divisors (269645934).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216516498 is a wasteful number, since it uses less digits than its factorization.

216516498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599.

The product of its digits is 103680, while the sum is 42.

The square root of 216516498 is about 14714.4995837439. The cubic root of 216516498 is about 600.4778582071.

The spelling of 216516498 in words is "two hundred sixteen million, five hundred sixteen thousand, four hundred ninety-eight".