2181930332 has 6 divisors (see below), whose sum is σ = 3818378088. Its totient is φ = 1090965164.

The previous prime is 2181930313. The next prime is 2181930347. The reversal of 2181930332 is 2330391812.

It is a super-3 number, since 3×2181930332³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272741288 + ... + 272741295.

It is an arithmetic number, because the mean of its divisors is an integer number (636396348).

Almost surely, 2^2181930332 is an apocalyptic number.

It is an amenable number.

2181930332 is a deficient number, since it is larger than the sum of its proper divisors (1636447756).

2181930332 is a wasteful number, since it uses less digits than its factorization.

2181930332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545482587 (or 545482585 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 2181930332 is about 46711.1371302391. The cubic root of 2181930332 is about 1297.0208569620.

The spelling of 2181930332 in words is "two billion, one hundred eighty-one million, nine hundred thirty thousand, three hundred thirty-two".