87020518281 has 16 divisors (see below), whose sum is σ = 116296020864. Its totient is φ = 57879457664.

The previous prime is 87020518267. The next prime is 87020518309. The reversal of 87020518281 is 18281502078.

It is a cyclic number.

It is not a de Polignac number, because 87020518281 - 2¹³ = 87020510089 is a prime.

It is a super-2 number, since 2×87020518281² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (87020518241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3474901 + ... + 3499853.

It is an arithmetic number, because the mean of its divisors is an integer number (7268501304).

Almost surely, 2^87020518281 is an apocalyptic number.

It is an amenable number.

87020518281 is a deficient number, since it is larger than the sum of its proper divisors (29275502583).

87020518281 is a wasteful number, since it uses less digits than its factorization.

87020518281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27600.

The product of its (nonzero) digits is 71680, while the sum is 42.

The spelling of 87020518281 in words is "eighty-seven billion, twenty million, five hundred eighteen thousand, two hundred eighty-one".