2181376317 has 16 divisors (see below), whose sum is σ = 3011950080. Its totient is φ = 1402632000.

The previous prime is 2181376313. The next prime is 2181376331. The reversal of 2181376317 is 7136731812.

It is not a de Polignac number, because 2181376317 - 2² = 2181376313 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2181376313) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73567 + ... + 98867.

It is an arithmetic number, because the mean of its divisors is an integer number (188246880).

Almost surely, 2^2181376317 is an apocalyptic number.

It is an amenable number.

2181376317 is a deficient number, since it is larger than the sum of its proper divisors (830573763).

2181376317 is a wasteful number, since it uses less digits than its factorization.

2181376317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26324.

The product of its digits is 42336, while the sum is 39.

The square root of 2181376317 is about 46705.2065298934. The cubic root of 2181376317 is about 1296.9110719357.

The spelling of 2181376317 in words is "two billion, one hundred eighty-one million, three hundred seventy-six thousand, three hundred seventeen".