217275139 has 8 divisors (see below), whose sum is σ = 220368960. Its totient is φ = 214200000.

The previous prime is 217275133. The next prime is 217275151. The reversal of 217275139 is 931572712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 217275139 - 2³ = 217275131 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 217275098 and 217275107.

It is not an unprimeable number, because it can be changed into a prime (217275131) 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, 19639 + ... + 28639.

It is an arithmetic number, because the mean of its divisors is an integer number (27546120).

Almost surely, 2^217275139 is an apocalyptic number.

217275139 is a deficient number, since it is larger than the sum of its proper divisors (3093821).

217275139 is a wasteful number, since it uses less digits than its factorization.

217275139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9341.

The product of its digits is 26460, while the sum is 37.

The square root of 217275139 is about 14740.2557304817. The cubic root of 217275139 is about 601.1783684904.

The spelling of 217275139 in words is "two hundred seventeen million, two hundred seventy-five thousand, one hundred thirty-nine".