213218757660 has 24 divisors (see below), whose sum is σ = 597012521616. Its totient is φ = 56858335360.

The previous prime is 213218757659. The next prime is 213218757667. The reversal of 213218757660 is 66757812312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213218757667) 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, 1776822921 + ... + 1776823040.

It is an arithmetic number, because the mean of its divisors is an integer number (24875521734).

Almost surely, 2^213218757660 is an apocalyptic number.

213218757660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213218757660 is an abundant number, since it is smaller than the sum of its proper divisors (383793763956).

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

213218757660 is a wasteful number, since it uses less digits than its factorization.

213218757660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3553645973 (or 3553645971 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 48.

The spelling of 213218757660 in words is "two hundred thirteen billion, two hundred eighteen million, seven hundred fifty-seven thousand, six hundred sixty".