2112551440 has 40 divisors (see below), whose sum is σ = 4940105688. Its totient is φ = 840130560.

The previous prime is 2112551431. The next prime is 2112551443. The reversal of 2112551440 is 441552112.

It can be written as a sum of positive squares in 4 ways, for example, as 122677776 + 1989873664 = 11076^2 + 44608^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (2112551443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62481 + ... + 90160.

Almost surely, 2^2112551440 is an apocalyptic number.

2112551440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2112551440 is an abundant number, since it is smaller than the sum of its proper divisors (2827554248).

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

2112551440 is a wasteful number, since it uses less digits than its factorization.

2112551440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152827 (or 152821 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 2112551440 is about 45962.5003671471. The cubic root of 2112551440 is about 1283.1253865951.

The spelling of 2112551440 in words is "two billion, one hundred twelve million, five hundred fifty-one thousand, four hundred forty".