87518505 has 32 divisors (see below), whose sum is σ = 145905408. Its totient is φ = 44755200.

The previous prime is 87518471. The next prime is 87518507. The reversal of 87518505 is 50581578.

It is not a de Polignac number, because 87518505 - 2⁷ = 87518377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87518507) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38295 + ... + 40515.

It is an arithmetic number, because the mean of its divisors is an integer number (4559544).

Almost surely, 2^87518505 is an apocalyptic number.

It is an amenable number.

87518505 is a deficient number, since it is larger than the sum of its proper divisors (58386903).

87518505 is a wasteful number, since it uses less digits than its factorization.

87518505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2337.

The product of its (nonzero) digits is 56000, while the sum is 39.

The square root of 87518505 is about 9355.1325484998. The cubic root of 87518505 is about 443.9832951673.

The spelling of 87518505 in words is "eighty-seven million, five hundred eighteen thousand, five hundred five".