217108 has 6 divisors (see below), whose sum is σ = 379946. Its totient is φ = 108552.

The previous prime is 217081. The next prime is 217111. The reversal of 217108 is 801712.

It can be written as a sum of positive squares in only one way, i.e., 150544 + 66564 = 388^2 + 258^2 .

It is a plaindrome in base 15.

It is a zygodrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27135 + ... + 27142.

2²¹⁷¹⁰⁸ is an apocalyptic number.

It is an amenable number.

217108 is a deficient number, since it is larger than the sum of its proper divisors (162838).

217108 is a wasteful number, since it uses less digits than its factorization.

217108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54281 (or 54279 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 19.

The square root of 217108 is about 465.9484950078. The cubic root of 217108 is about 60.1024176701.

It can be divided in two parts, 217 and 108, that multiplied together give a triangular number (23436 = T₂₁₆).

The spelling of 217108 in words is "two hundred seventeen thousand, one hundred eight".