2115638943 has 24 divisors (see below), whose sum is σ = 3187107456. Its totient is φ = 1237975200.

The previous prime is 2115638929. The next prime is 2115638951. The reversal of 2115638943 is 3498365112.

It is not a de Polignac number, because 2115638943 - 2⁵ = 2115638911 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2115638895 and 2115638904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2115638983) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10363 + ... + 65868.

It is an arithmetic number, because the mean of its divisors is an integer number (132796144).

Almost surely, 2^2115638943 is an apocalyptic number.

2115638943 is a deficient number, since it is larger than the sum of its proper divisors (1071468513).

2115638943 is a wasteful number, since it uses less digits than its factorization.

2115638943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76303 (or 76274 counting only the distinct ones).

The product of its digits is 155520, while the sum is 42.

The square root of 2115638943 is about 45996.0752999645. The cubic root of 2115638943 is about 1283.7501800683.

The spelling of 2115638943 in words is "two billion, one hundred fifteen million, six hundred thirty-eight thousand, nine hundred forty-three".