87471564831 has 24 divisors (see below), whose sum is σ = 144469802880. Its totient is φ = 49958724816.

The previous prime is 87471564823. The next prime is 87471564847. The reversal of 87471564831 is 13846517478.

87471564831 is a `hidden beast` number, since 8 + 7 + 4 + 7 + 156 + 483 + 1 = 666.

It is not a de Polignac number, because 87471564831 - 2³ = 87471564823 is a prime.

It is a super-2 number, since 2×87471564831² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87471562831) 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 23 ways as a sum of consecutive naturals, for example, 220401 + ... + 472778.

It is an arithmetic number, because the mean of its divisors is an integer number (6019575120).

Almost surely, 2^87471564831 is an apocalyptic number.

87471564831 is a deficient number, since it is larger than the sum of its proper divisors (56998238049).

87471564831 is a wasteful number, since it uses less digits than its factorization.

87471564831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695195 (or 695192 counting only the distinct ones).

The product of its digits is 4515840, while the sum is 54.

The spelling of 87471564831 in words is "eighty-seven billion, four hundred seventy-one million, five hundred sixty-four thousand, eight hundred thirty-one".