218071214831 has 8 divisors (see below), whose sum is σ = 221285149344. Its totient is φ = 214861239040.

The previous prime is 218071214773. The next prime is 218071214849. The reversal of 218071214831 is 138412170812.

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 218071214831 - 2¹⁰ = 218071213807 is a prime.

It is a super-2 number, since 2×218071214831² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218071213831) 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, 878606 + ... + 1099131.

It is an arithmetic number, because the mean of its divisors is an integer number (27660643668).

Almost surely, 2^218071214831 is an apocalyptic number.

218071214831 is a deficient number, since it is larger than the sum of its proper divisors (3213934513).

218071214831 is a wasteful number, since it uses less digits than its factorization.

218071214831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1979361.

The product of its (nonzero) digits is 21504, while the sum is 38.

The spelling of 218071214831 in words is "two hundred eighteen billion, seventy-one million, two hundred fourteen thousand, eight hundred thirty-one".