2180631939 has 8 divisors (see below), whose sum is σ = 3078539280. Its totient is φ = 1368239616.

The previous prime is 2180631907. The next prime is 2180631941. The reversal of 2180631939 is 9391360812.

2180631939 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2180631939 - 2⁵ = 2180631907 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2180631939.

It is not an unprimeable number, because it can be changed into a prime (2180631949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21378694 + ... + 21378795.

It is an arithmetic number, because the mean of its divisors is an integer number (384817410).

Almost surely, 2^2180631939 is an apocalyptic number.

2180631939 is a deficient number, since it is larger than the sum of its proper divisors (897907341).

2180631939 is a wasteful number, since it uses less digits than its factorization.

2180631939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42757509.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 2180631939 is about 46697.2369525221. The cubic root of 2180631939 is about 1296.7635348214.

The spelling of 2180631939 in words is "two billion, one hundred eighty million, six hundred thirty-one thousand, nine hundred thirty-nine".