2181755339 has 8 divisors (see below), whose sum is σ = 2192798208. Its totient is φ = 2170725480.

The previous prime is 2181755327. The next prime is 2181755377. The reversal of 2181755339 is 9335571812.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2181755339 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2181755339.

It is not an unprimeable number, because it can be changed into a prime (2181751339) 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, 599054 + ... + 602684.

It is an arithmetic number, because the mean of its divisors is an integer number (274099776).

Almost surely, 2^2181755339 is an apocalyptic number.

2181755339 is a deficient number, since it is larger than the sum of its proper divisors (11042869).

2181755339 is a wasteful number, since it uses less digits than its factorization.

2181755339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6505.

The product of its digits is 226800, while the sum is 44.

The square root of 2181755339 is about 46709.2639526679. The cubic root of 2181755339 is about 1296.9861819106.

The spelling of 2181755339 in words is "two billion, one hundred eighty-one million, seven hundred fifty-five thousand, three hundred thirty-nine".