87531512 has 16 divisors (see below), whose sum is σ = 169781400. Its totient is φ = 42256480.

The previous prime is 87531511. The next prime is 87531517. The reversal of 87531512 is 21513578.

It is a super-2 number, since 2×87531512² = 15323531186012288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87531511) 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, 188414 + ... + 188877.

Almost surely, 2^87531512 is an apocalyptic number.

It is an amenable number.

87531512 is a deficient number, since it is larger than the sum of its proper divisors (82249888).

87531512 is a wasteful number, since it uses less digits than its factorization.

87531512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377326 (or 377322 counting only the distinct ones).

The product of its digits is 8400, while the sum is 32.

The square root of 87531512 is about 9355.8277025606. The cubic root of 87531512 is about 444.0052890099.

The spelling of 87531512 in words is "eighty-seven million, five hundred thirty-one thousand, five hundred twelve".