2182321881 has 12 divisors (see below), whose sum is σ = 3156258352. Its totient is φ = 1453027896.

The previous prime is 2182321877. The next prime is 2182321937. The reversal of 2182321881 is 1881232812.

It is not a de Polignac number, because 2182321881 - 2² = 2182321877 is a prime.

It is a super-2 number, since 2×2182321881² = 9525057584582756322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2182321861) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 146971 + ... + 161136.

Almost surely, 2^2182321881 is an apocalyptic number.

It is an amenable number.

2182321881 is a deficient number, since it is larger than the sum of its proper divisors (973936471).

2182321881 is a wasteful number, since it uses less digits than its factorization.

2182321881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308900 (or 308897 counting only the distinct ones).

The product of its digits is 12288, while the sum is 36.

The square root of 2182321881 is about 46715.3281161548. The cubic root of 2182321881 is about 1297.0984361033.

The spelling of 2182321881 in words is "two billion, one hundred eighty-two million, three hundred twenty-one thousand, eight hundred eighty-one".