2181310932 has 12 divisors (see below), whose sum is σ = 5089725536. Its totient is φ = 727103640.

The previous prime is 2181310927. The next prime is 2181310933. The reversal of 2181310932 is 2390131812.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 2181310932.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2181310933) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90887944 + ... + 90887967.

Almost surely, 2^2181310932 is an apocalyptic number.

It is an amenable number.

2181310932 is an abundant number, since it is smaller than the sum of its proper divisors (2908414604).

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

2181310932 is a wasteful number, since it uses less digits than its factorization.

2181310932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181775918 (or 181775916 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 2181310932 is about 46704.5065491543. The cubic root of 2181310932 is about 1296.8981138510.

The spelling of 2181310932 in words is "two billion, one hundred eighty-one million, three hundred ten thousand, nine hundred thirty-two".