2181217848 has 32 divisors (see below), whose sum is σ = 5454380160. Its totient is φ = 726894560.

The previous prime is 2181217781. The next prime is 2181217849. The reversal of 2181217848 is 8487121812.

It is a super-2 number, since 2×2181217848² = 9515422600867502208, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2181217849) 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, 120853 + ... + 137723.

It is an arithmetic number, because the mean of its divisors is an integer number (170449380).

Almost surely, 2^2181217848 is an apocalyptic number.

It is an amenable number.

2181217848 is an abundant number, since it is smaller than the sum of its proper divisors (3273162312).

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

2181217848 is a wasteful number, since it uses less digits than its factorization.

2181217848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22267 (or 22263 counting only the distinct ones).

The product of its digits is 57344, while the sum is 42.

The square root of 2181217848 is about 46703.5100179847. The cubic root of 2181217848 is about 1296.8796658954.

The spelling of 2181217848 in words is "two billion, one hundred eighty-one million, two hundred seventeen thousand, eight hundred forty-eight".