216690118 has 4 divisors (see below), whose sum is σ = 325035180. Its totient is φ = 108345058.

The previous prime is 216690077. The next prime is 216690119. The reversal of 216690118 is 811096612.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216690119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54172528 + ... + 54172531.

It is an arithmetic number, because the mean of its divisors is an integer number (81258795).

Almost surely, 2^216690118 is an apocalyptic number.

216690118 is a deficient number, since it is larger than the sum of its proper divisors (108345062).

216690118 is a wasteful number, since it uses less digits than its factorization.

216690118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108345061.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 216690118 is about 14720.3980245101. The cubic root of 216690118 is about 600.6383188225.

The spelling of 216690118 in words is "two hundred sixteen million, six hundred ninety thousand, one hundred eighteen".