2181273308 has 24 divisors (see below), whose sum is σ = 3921094464. Its totient is φ = 1061107200.

The previous prime is 2181273307. The next prime is 2181273331. The reversal of 2181273308 is 8033721812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2181273301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42068 + ... + 78308.

It is an arithmetic number, because the mean of its divisors is an integer number (163378936).

Almost surely, 2^2181273308 is an apocalyptic number.

It is an amenable number.

2181273308 is a deficient number, since it is larger than the sum of its proper divisors (1739821156).

2181273308 is a wasteful number, since it uses less digits than its factorization.

2181273308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36653 (or 36651 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 2181273308 is about 46704.1037597340. The cubic root of 2181273308 is about 1296.8906573601.

The spelling of 2181273308 in words is "two billion, one hundred eighty-one million, two hundred seventy-three thousand, three hundred eight".