217255144039 has 8 divisors (see below), whose sum is σ = 224757308160. Its totient is φ = 209753687136.

The previous prime is 217255144009. The next prime is 217255144061. The reversal of 217255144039 is 930441552712.

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 217255144039 - 2³⁷ = 79816190567 is a prime.

It is a super-3 number, since 3×217255144039³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 217255143986 and 217255144004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217255144009) 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, 491002 + ... + 821944.

It is an arithmetic number, because the mean of its divisors is an integer number (28094663520).

Almost surely, 2^217255144039 is an apocalyptic number.

217255144039 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

217255144039 is a deficient number, since it is larger than the sum of its proper divisors (7502164121).

217255144039 is a wasteful number, since it uses less digits than its factorization.

217255144039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353609.

The product of its (nonzero) digits is 302400, while the sum is 43.

The spelling of 217255144039 in words is "two hundred seventeen billion, two hundred fifty-five million, one hundred forty-four thousand, thirty-nine".