218524425812 has 96 divisors (see below), whose sum is σ = 493908952320. Its totient is φ = 82088939520.

The previous prime is 218524425809. The next prime is 218524425827.

218524425812 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6530468 + ... + 6563844.

It is an arithmetic number, because the mean of its divisors is an integer number (5144884920).

Almost surely, 2^218524425812 is an apocalyptic number.

218524425812 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 218524425812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (246954476160).

218524425812 is an abundant number, since it is smaller than the sum of its proper divisors (275384526508).

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

218524425812 is a wasteful number, since it uses less digits than its factorization.

218524425812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34161 (or 34159 counting only the distinct ones).

The product of its digits is 409600, while the sum is 44.

The spelling of 218524425812 in words is "two hundred eighteen billion, five hundred twenty-four million, four hundred twenty-five thousand, eight hundred twelve".