87505515131 has 8 divisors (see below), whose sum is σ = 92707143840. Its totient is φ = 82309913728.

The previous prime is 87505515103. The next prime is 87505515169. The reversal of 87505515131 is 13151550578.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87505515131 is a prime.

It is a super-2 number, since 2×87505515131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87505515431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1476911 + ... + 1535016.

It is an arithmetic number, because the mean of its divisors is an integer number (11588392980).

Almost surely, 2^87505515131 is an apocalyptic number.

87505515131 is a deficient number, since it is larger than the sum of its proper divisors (5201628709).

87505515131 is a wasteful number, since it uses less digits than its factorization.

87505515131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3013653.

The product of its (nonzero) digits is 105000, while the sum is 41.

The spelling of 87505515131 in words is "eighty-seven billion, five hundred five million, five hundred fifteen thousand, one hundred thirty-one".