218431522139260 has 48 divisors (see below), whose sum is σ = 460044330699744. Its totient is φ = 87117743904768.

The previous prime is 218431522139183. The next prime is 218431522139267. The reversal of 218431522139260 is 62931225134812.

218431522139260 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218431522139267) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 201670672 + ... + 202750888.

It is an arithmetic number, because the mean of its divisors is an integer number (9584256889578).

Almost surely, 2^{218431522139260} is an apocalyptic number.

218431522139260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

218431522139260 is an abundant number, since it is smaller than the sum of its proper divisors (241612808560484).

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

218431522139260 is a wasteful number, since it uses less digits than its factorization.

218431522139260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1109710 (or 1109708 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 49.

The spelling of 218431522139260 in words is "two hundred eighteen trillion, four hundred thirty-one billion, five hundred twenty-two million, one hundred thirty-nine thousand, two hundred sixty".