217008116 has 24 divisors (see below), whose sum is σ = 409718400. Its totient is φ = 99976032.

The previous prime is 217008067. The next prime is 217008119. The reversal of 217008116 is 611800712.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217008119) 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, 27665 + ... + 34631.

It is an arithmetic number, because the mean of its divisors is an integer number (17071600).

Almost surely, 2^217008116 is an apocalyptic number.

217008116 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

217008116 is a deficient number, since it is larger than the sum of its proper divisors (192710284).

217008116 is a wasteful number, since it uses less digits than its factorization.

217008116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7583 (or 7581 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 26.

The square root of 217008116 is about 14731.1953350704. The cubic root of 217008116 is about 600.9319923084.

Adding to 217008116 its reverse (611800712), we get a palindrome (828808828).

The spelling of 217008116 in words is "two hundred seventeen million, eight thousand, one hundred sixteen".