87228928321 has 4 divisors (see below), whose sum is σ = 87553199700. Its totient is φ = 86904656944.

The previous prime is 87228928309. The next prime is 87228928331. The reversal of 87228928321 is 12382982278.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 36033530625 + 51195397696 = 189825^2 + 226264^2 .

It is a cyclic number.

It is not a de Polignac number, because 87228928321 - 2⁵ = 87228928289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87228928331) 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, 162135286 + ... + 162135823.

It is an arithmetic number, because the mean of its divisors is an integer number (21888299925).

Almost surely, 2^87228928321 is an apocalyptic number.

It is an amenable number.

87228928321 is a deficient number, since it is larger than the sum of its proper divisors (324271379).

87228928321 is a wasteful number, since it uses less digits than its factorization.

87228928321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324271378.

The product of its digits is 1548288, while the sum is 52.

The spelling of 87228928321 in words is "eighty-seven billion, two hundred twenty-eight million, nine hundred twenty-eight thousand, three hundred twenty-one".