216500234 has 4 divisors (see below), whose sum is σ = 324750354. Its totient is φ = 108250116.

The previous prime is 216500201. The next prime is 216500237. The reversal of 216500234 is 432005612.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 207216025 + 9284209 = 14395^2 + 3047^2 .

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 as a sum of consecutive naturals, namely, 54125057 + ... + 54125060.

Almost surely, 2^216500234 is an apocalyptic number.

216500234 is a deficient number, since it is larger than the sum of its proper divisors (108250120).

216500234 is a wasteful number, since it uses less digits than its factorization.

216500234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108250119.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 216500234 is about 14713.9469212037. The cubic root of 216500234 is about 600.4628225300.

Adding to 216500234 its reverse (432005612), we get a palindrome (648505846).

The spelling of 216500234 in words is "two hundred sixteen million, five hundred thousand, two hundred thirty-four".