87316615131 has 4 divisors (see below), whose sum is σ = 116422153512. Its totient is φ = 58211076752.

The previous prime is 87316615121. The next prime is 87316615163. The reversal of 87316615131 is 13151661378.

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

It is a cyclic number.

It is not a de Polignac number, because 87316615131 - 2⁷ = 87316615003 is a prime.

It is a super-2 number, since 2×87316615131² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (87316615121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14552769186 + ... + 14552769191.

It is an arithmetic number, because the mean of its divisors is an integer number (29105538378).

Almost surely, 2^87316615131 is an apocalyptic number.

87316615131 is a deficient number, since it is larger than the sum of its proper divisors (29105538381).

87316615131 is a wasteful number, since it uses less digits than its factorization.

87316615131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29105538380.

The product of its digits is 90720, while the sum is 42.

The spelling of 87316615131 in words is "eighty-seven billion, three hundred sixteen million, six hundred fifteen thousand, one hundred thirty-one".