87431512 has 32 divisors (see below), whose sum is σ = 189734400. Its totient is φ = 36994464.

The previous prime is 87431497. The next prime is 87431543. The reversal of 87431512 is 21513478.

It is a super-2 number, since 2×87431512² = 15288538581212288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5458 + ... + 14305.

It is an arithmetic number, because the mean of its divisors is an integer number (5929200).

Almost surely, 2^87431512 is an apocalyptic number.

It is an amenable number.

87431512 is an abundant number, since it is smaller than the sum of its proper divisors (102302888).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

87431512 is a wasteful number, since it uses less digits than its factorization.

87431512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19855 (or 19851 counting only the distinct ones).

The product of its digits is 6720, while the sum is 31.

The square root of 87431512 is about 9350.4819127144. The cubic root of 87431512 is about 443.8361406006.

The spelling of 87431512 in words is "eighty-seven million, four hundred thirty-one thousand, five hundred twelve".