2115564210 has 128 divisors (see below), whose sum is σ = 5863449600. Its totient is φ = 542142720.

The previous prime is 2115564203. The next prime is 2115564223. The reversal of 2115564210 is 124655112.

2115564210 is a `hidden beast` number, since 2 + 1 + 1 + 5 + 5 + 642 + 10 = 666.

It is a super-3 number, since 3×2115564210³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2121432 + ... + 2122428.

It is an arithmetic number, because the mean of its divisors is an integer number (45808200).

Almost surely, 2^2115564210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2115564210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2931724800).

2115564210 is an abundant number, since it is smaller than the sum of its proper divisors (3747885390).

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

2115564210 is a wasteful number, since it uses less digits than its factorization.

2115564210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1313 (or 1307 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 2115564210 is about 45995.2629082605. The cubic root of 2115564210 is about 1283.7350641255.

The spelling of 2115564210 in words is "two billion, one hundred fifteen million, five hundred sixty-four thousand, two hundred ten".