2112540440 has 32 divisors (see below), whose sum is σ = 4775762160. Its totient is φ = 841008000.

The previous prime is 2112540427. The next prime is 2112540449. The reversal of 2112540440 is 440452112.

It is a super-2 number, since 2×2112540440² = 8925654221270787200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112540449) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 116711 + ... + 133590.

Almost surely, 2^2112540440 is an apocalyptic number.

2112540440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2112540440 is an abundant number, since it is smaller than the sum of its proper divisors (2663221720).

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

2112540440 is a wasteful number, since it uses less digits than its factorization.

2112540440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250523 (or 250519 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 2112540440 is about 45962.3807042238. The cubic root of 2112540440 is about 1283.1231595245.

Adding to 2112540440 its reverse (440452112), we get a palindrome (2552992552).

The spelling of 2112540440 in words is "two billion, one hundred twelve million, five hundred forty thousand, four hundred forty".