216500236 has 24 divisors (see below), whose sum is σ = 409703616. Its totient is φ = 99713280.

The previous prime is 216500201. The next prime is 216500237. The reversal of 216500236 is 632005612.

It is a self number, because there is not a number n which added to its sum of digits gives 216500236.

It is not an unprimeable number, because it can be changed into a prime (216500237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30675 + ... + 37066.

It is an arithmetic number, because the mean of its divisors is an integer number (17070984).

Almost surely, 2^216500236 is an apocalyptic number.

It is an amenable number.

216500236 is a deficient number, since it is larger than the sum of its proper divisors (193203380).

216500236 is a wasteful number, since it uses less digits than its factorization.

216500236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67809 (or 67807 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 216500236 is about 14713.9469891664. The cubic root of 216500236 is about 600.4628243790.

Adding to 216500236 its reverse (632005612), we get a palindrome (848505848).

The spelling of 216500236 in words is "two hundred sixteen million, five hundred thousand, two hundred thirty-six".