217241427838 has 8 divisors (see below), whose sum is σ = 325865984688. Its totient is φ = 108619432944.

The previous prime is 217241427779. The next prime is 217241427877. The reversal of 217241427838 is 838724142712.

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

It is a super-2 number, since 2×217241427838² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 217241427791 and 217241427800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 412231 + ... + 777442.

It is an arithmetic number, because the mean of its divisors is an integer number (40733248086).

Almost surely, 2^217241427838 is an apocalyptic number.

217241427838 is a deficient number, since it is larger than the sum of its proper divisors (108624556850).

217241427838 is a wasteful number, since it uses less digits than its factorization.

217241427838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1280978.

The product of its digits is 1204224, while the sum is 49.

The spelling of 217241427838 in words is "two hundred seventeen billion, two hundred forty-one million, four hundred twenty-seven thousand, eight hundred thirty-eight".