2081505887 has 4 divisors (see below), whose sum is σ = 2081610816. Its totient is φ = 2081400960.

The previous prime is 2081505883. The next prime is 2081505889. The reversal of 2081505887 is 7885051802.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2081505887 - 2² = 2081505883 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2081505883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12623 + ... + 65744.

It is an arithmetic number, because the mean of its divisors is an integer number (520402704).

Almost surely, 2^2081505887 is an apocalyptic number.

2081505887 is a deficient number, since it is larger than the sum of its proper divisors (104929).

2081505887 is an equidigital number, since it uses as much as digits as its factorization.

2081505887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104928.

The product of its (nonzero) digits is 179200, while the sum is 44.

The square root of 2081505887 is about 45623.5233952837. The cubic root of 2081505887 is about 1276.8088409162.

The spelling of 2081505887 in words is "two billion, eighty-one million, five hundred five thousand, eight hundred eighty-seven".