2122815888 has 120 divisors (see below), whose sum is σ = 6280029600. Its totient is φ = 667533312.

The previous prime is 2122815887. The next prime is 2122815901. The reversal of 2122815888 is 8885182212.

It is not an unprimeable number, because it can be changed into a prime (2122815887) 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, 701643 + ... + 704661.

It is an arithmetic number, because the mean of its divisors is an integer number (52333580).

Almost surely, 2^2122815888 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2122815888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3140014800).

2122815888 is an abundant number, since it is smaller than the sum of its proper divisors (4157213712).

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

2122815888 is a wasteful number, since it uses less digits than its factorization.

2122815888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3309 (or 3300 counting only the distinct ones).

The product of its digits is 163840, while the sum is 45.

The square root of 2122815888 is about 46074.0261752758. The cubic root of 2122815888 is about 1285.2001763378.

The spelling of 2122815888 in words is "two billion, one hundred twenty-two million, eight hundred fifteen thousand, eight hundred eighty-eight".