2181815280822 has 8 divisors (see below), whose sum is σ = 4363630561656. Its totient is φ = 727271760272.

The previous prime is 2181815280811. The next prime is 2181815280871. The reversal of 2181815280822 is 2280825181812.

It is a sphenic number, since it is the product of 3 distinct primes.

2181815280822 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181817940063 + ... + 181817940074.

It is an arithmetic number, because the mean of its divisors is an integer number (545453820207).

Almost surely, 2^{2181815280822} is an apocalyptic number.

2181815280822 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2181815280822 is a wasteful number, since it uses less digits than its factorization.

2181815280822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363635880142.

The product of its (nonzero) digits is 327680, while the sum is 48.

The spelling of 2181815280822 in words is "two trillion, one hundred eighty-one billion, eight hundred fifteen million, two hundred eighty thousand, eight hundred twenty-two".