2112505520 has 20 divisors (see below), whose sum is σ = 4911575520. Its totient is φ = 845002176.

The previous prime is 2112505517. The next prime is 2112505523. The reversal of 2112505520 is 255052112.

It is an interprime number because it is at equal distance from previous prime (2112505517) and next prime (2112505523).

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (2112505523) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 13203080 + ... + 13203239.

It is an arithmetic number, because the mean of its divisors is an integer number (245578776).

Almost surely, 2^2112505520 is an apocalyptic number.

2112505520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2112505520 is an abundant number, since it is smaller than the sum of its proper divisors (2799070000).

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

2112505520 is a wasteful number, since it uses less digits than its factorization.

2112505520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26406332 (or 26406326 counting only the distinct ones).

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

The square root of 2112505520 is about 45962.0008267699. Note that the first 3 decimals coincide. The cubic root of 2112505520 is about 1283.1160895363.

Adding to 2112505520 its reverse (255052112), we get a palindrome (2367557632).

The spelling of 2112505520 in words is "two billion, one hundred twelve million, five hundred five thousand, five hundred twenty".