2138873517 has 12 divisors (see below), whose sum is σ = 3370346304. Its totient is φ = 1296286920.

The previous prime is 2138873497. The next prime is 2138873519. The reversal of 2138873517 is 7153788312.

2138873517 is a `hidden beast` number, since 21 + 38 + 87 + 3 + 517 = 666.

It is not a de Polignac number, because 2138873517 - 2¹⁶ = 2138807981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2138873519) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10802293 + ... + 10802490.

It is an arithmetic number, because the mean of its divisors is an integer number (280862192).

Almost surely, 2^2138873517 is an apocalyptic number.

It is an amenable number.

2138873517 is a deficient number, since it is larger than the sum of its proper divisors (1231472787).

2138873517 is a wasteful number, since it uses less digits than its factorization.

2138873517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21604800 (or 21604797 counting only the distinct ones).

The product of its digits is 282240, while the sum is 45.

The square root of 2138873517 is about 46247.9568954132. The cubic root of 2138873517 is about 1288.4325888109.

The spelling of 2138873517 in words is "two billion, one hundred thirty-eight million, eight hundred seventy-three thousand, five hundred seventeen".