217116745100 has 18 divisors (see below), whose sum is σ = 471143337084. Its totient is φ = 86846698000.

The previous prime is 217116745099. The next prime is 217116745103. The reversal of 217116745100 is 1547611712.

It is not an unprimeable number, because it can be changed into a prime (217116745103) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1085583626 + ... + 1085583825.

It is an arithmetic number, because the mean of its divisors is an integer number (26174629838).

Almost surely, 2^217116745100 is an apocalyptic number.

217116745100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

217116745100 is an abundant number, since it is smaller than the sum of its proper divisors (254026591984).

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

217116745100 is a wasteful number, since it uses less digits than its factorization.

217116745100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2171167465 (or 2171167458 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 35.

The spelling of 217116745100 in words is "two hundred seventeen billion, one hundred sixteen million, seven hundred forty-five thousand, one hundred".