2115931986 has 96 divisors (see below), whose sum is σ = 5349427200. Its totient is φ = 591948000.

The previous prime is 2115931973. The next prime is 2115932009. The reversal of 2115931986 is 6891395112.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2817111 + ... + 2817861.

It is an arithmetic number, because the mean of its divisors is an integer number (55723200).

Almost surely, 2^2115931986 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2115931986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2674713600).

2115931986 is an abundant number, since it is smaller than the sum of its proper divisors (3233495214).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2115931986 is a wasteful number, since it uses less digits than its factorization.

2115931986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1204 (or 1201 counting only the distinct ones).

The product of its digits is 116640, while the sum is 45.

The square root of 2115931986 is about 45999.2607114506. The cubic root of 2115931986 is about 1283.8094492610.

The spelling of 2115931986 in words is "two billion, one hundred fifteen million, nine hundred thirty-one thousand, nine hundred eighty-six".