2187512680 has 32 divisors (see below), whose sum is σ = 4925111040. Its totient is φ = 874434880.

The previous prime is 2187512633. The next prime is 2187512687. The reversal of 2187512680 is 862157812.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (2187512687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47265 + ... + 81295.

It is an arithmetic number, because the mean of its divisors is an integer number (153909720).

Almost surely, 2^2187512680 is an apocalyptic number.

2187512680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2187512680 is an abundant number, since it is smaller than the sum of its proper divisors (2737598360).

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

2187512680 is a wasteful number, since it uses less digits than its factorization.

2187512680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35649 (or 35645 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 40.

The square root of 2187512680 is about 46770.8528893797. The cubic root of 2187512680 is about 1298.1260336798.

The spelling of 2187512680 in words is "two billion, one hundred eighty-seven million, five hundred twelve thousand, six hundred eighty".