2115697892 has 72 divisors (see below), whose sum is σ = 4775819328. Its totient is φ = 810734400.

The previous prime is 2115697879. The next prime is 2115697921. The reversal of 2115697892 is 2987965112.

It is a self number, because there is not a number n which added to its sum of digits gives 2115697892.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 123473 + ... + 139559.

It is an arithmetic number, because the mean of its divisors is an integer number (66330824).

Almost surely, 2^2115697892 is an apocalyptic number.

2115697892 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2115697892, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2387909664).

2115697892 is an abundant number, since it is smaller than the sum of its proper divisors (2660121436).

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

2115697892 is a wasteful number, since it uses less digits than its factorization.

2115697892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16177 (or 16168 counting only the distinct ones).

The product of its digits is 544320, while the sum is 50.

The square root of 2115697892 is about 45996.7161001739. The cubic root of 2115697892 is about 1283.7621031939.

It can be divided in two parts, 2115 and 697892, that added together give a palindrome (700007).

The spelling of 2115697892 in words is "two billion, one hundred fifteen million, six hundred ninety-seven thousand, eight hundred ninety-two".