2181306039 has 64 divisors (see below), whose sum is σ = 3503001600. Its totient is φ = 1195112160.

The previous prime is 2181306031. The next prime is 2181306059. The reversal of 2181306039 is 9306031812.

It is not a de Polignac number, because 2181306039 - 2³ = 2181306031 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2181306031) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5205772 + ... + 5206190.

It is an arithmetic number, because the mean of its divisors is an integer number (54734400).

Almost surely, 2^2181306039 is an apocalyptic number.

2181306039 is a deficient number, since it is larger than the sum of its proper divisors (1321695561).

2181306039 is a wasteful number, since it uses less digits than its factorization.

2181306039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513 (or 475 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 2181306039 is about 46704.4541665996. The cubic root of 2181306039 is about 1296.8971441394.

The spelling of 2181306039 in words is "two billion, one hundred eighty-one million, three hundred six thousand, thirty-nine".