2115505220 has 24 divisors (see below), whose sum is σ = 4676380800. Its totient is φ = 801664992.

The previous prime is 2115505219. The next prime is 2115505237. The reversal of 2115505220 is 225055112.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2783180 + ... + 2783939.

It is an arithmetic number, because the mean of its divisors is an integer number (194849200).

Almost surely, 2^2115505220 is an apocalyptic number.

2115505220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2115505220 is an abundant number, since it is smaller than the sum of its proper divisors (2560875580).

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

2115505220 is a wasteful number, since it uses less digits than its factorization.

2115505220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5567147 (or 5567145 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 2115505220 is about 45994.6216421007. The cubic root of 2115505220 is about 1283.7231322045.

The spelling of 2115505220 in words is "two billion, one hundred fifteen million, five hundred five thousand, two hundred twenty".