218083421517 has 8 divisors (see below), whose sum is σ = 313145425824. Its totient is φ = 134205182448.

The previous prime is 218083421509. The next prime is 218083421531. The reversal of 218083421517 is 715124380812.

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

It is not a de Polignac number, because 218083421517 - 2³ = 218083421509 is a prime.

It is a super-3 number, since 3×218083421517³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218083421557) 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, 2795941263 + ... + 2795941340.

It is an arithmetic number, because the mean of its divisors is an integer number (39143178228).

Almost surely, 2^218083421517 is an apocalyptic number.

It is an amenable number.

218083421517 is a deficient number, since it is larger than the sum of its proper divisors (95062004307).

218083421517 is a wasteful number, since it uses less digits than its factorization.

218083421517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5591882619.

The product of its (nonzero) digits is 107520, while the sum is 42.

The spelling of 218083421517 in words is "two hundred eighteen billion, eighty-three million, four hundred twenty-one thousand, five hundred seventeen".