213780405244 has 96 divisors (see below), whose sum is σ = 469928954880. Its totient is φ = 82971744768.

The previous prime is 213780405211. The next prime is 213780405259. The reversal of 213780405244 is 442504087312.

It is a junction number, because it is equal to n+sod(n) for n = 213780405197 and 213780405206.

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, 23402902 + ... + 23412034.

It is an arithmetic number, because the mean of its divisors is an integer number (4895093280).

Almost surely, 2^213780405244 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213780405244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (234964477440).

213780405244 is an abundant number, since it is smaller than the sum of its proper divisors (256148549636).

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

213780405244 is a wasteful number, since it uses less digits than its factorization.

213780405244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11099 (or 11097 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 40.

The spelling of 213780405244 in words is "two hundred thirteen billion, seven hundred eighty million, four hundred five thousand, two hundred forty-four".