87100815 has 16 divisors (see below), whose sum is σ = 141724800. Its totient is φ = 45665952.

The previous prime is 87100801. The next prime is 87100831. The reversal of 87100815 is 51800178.

It is not a de Polignac number, because 87100815 - 2⁴ = 87100799 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48325 + ... + 50094.

It is an arithmetic number, because the mean of its divisors is an integer number (8857800).

Almost surely, 2^87100815 is an apocalyptic number.

87100815 is a deficient number, since it is larger than the sum of its proper divisors (54623985).

87100815 is a wasteful number, since it uses less digits than its factorization.

87100815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98486.

The product of its (nonzero) digits is 2240, while the sum is 30.

The square root of 87100815 is about 9332.7817396530. The cubic root of 87100815 is about 443.2758516814.

The spelling of 87100815 in words is "eighty-seven million, one hundred thousand, eight hundred fifteen".