87865072231 has 4 divisors (see below), whose sum is σ = 87865963264. Its totient is φ = 87864181200.

The previous prime is 87865072223. The next prime is 87865072283. The reversal of 87865072231 is 13227056878.

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 87865072231 - 2³ = 87865072223 is a prime.

It is a super-2 number, since 2×87865072231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87865072931) 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, 276135 + ... + 501976.

It is an arithmetic number, because the mean of its divisors is an integer number (21966490816).

Almost surely, 2^87865072231 is an apocalyptic number.

87865072231 is a deficient number, since it is larger than the sum of its proper divisors (891033).

87865072231 is a wasteful number, since it uses less digits than its factorization.

87865072231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 891032.

The product of its (nonzero) digits is 1128960, while the sum is 49.

The spelling of 87865072231 in words is "eighty-seven billion, eight hundred sixty-five million, seventy-two thousand, two hundred thirty-one".