218251214844 has 24 divisors (see below), whose sum is σ = 548426130000. Its totient is φ = 67154219904.

The previous prime is 218251214789. The next prime is 218251214851. The reversal of 218251214844 is 448412152812.

It is a junction number, because it is equal to n+sod(n) for n = 218251214796 and 218251214805.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 699522969 + ... + 699523280.

It is an arithmetic number, because the mean of its divisors is an integer number (22851088750).

Almost surely, 2^218251214844 is an apocalyptic number.

It is an amenable number.

218251214844 is an abundant number, since it is smaller than the sum of its proper divisors (330174915156).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

218251214844 is a wasteful number, since it uses less digits than its factorization.

218251214844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1399046269 (or 1399046267 counting only the distinct ones).

The product of its digits is 163840, while the sum is 42.

The spelling of 218251214844 in words is "two hundred eighteen billion, two hundred fifty-one million, two hundred fourteen thousand, eight hundred forty-four".