2087851517 has 4 divisors (see below), whose sum is σ = 2107364256. Its totient is φ = 2068338780.

The previous prime is 2087851463. The next prime is 2087851529. The reversal of 2087851517 is 7151587802.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2087851517 - 2⁸ = 2087851261 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 (2087851567) 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 3 ways as a sum of consecutive naturals, for example, 9756209 + ... + 9756422.

It is an arithmetic number, because the mean of its divisors is an integer number (526841064).

Almost surely, 2^2087851517 is an apocalyptic number.

It is an amenable number.

2087851517 is a deficient number, since it is larger than the sum of its proper divisors (19512739).

2087851517 is a wasteful number, since it uses less digits than its factorization.

2087851517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19512738.

The product of its (nonzero) digits is 156800, while the sum is 44.

The square root of 2087851517 is about 45693.0138752085. The cubic root of 2087851517 is about 1278.1050078090.

The spelling of 2087851517 in words is "two billion, eighty-seven million, eight hundred fifty-one thousand, five hundred seventeen".