87851115 has 32 divisors (see below), whose sum is σ = 170380800. Its totient is φ = 42593760.

The previous prime is 87851111. The next prime is 87851119. The reversal of 87851115 is 51115878.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (87851111) and next prime (87851119).

It is not a de Polignac number, because 87851115 - 2² = 87851111 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87851115.

It is not an unprimeable number, because it can be changed into a prime (87851111) 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, 28095 + ... + 31064.

It is an arithmetic number, because the mean of its divisors is an integer number (5324400).

Almost surely, 2^87851115 is an apocalyptic number.

87851115 is a deficient number, since it is larger than the sum of its proper divisors (82529685).

87851115 is a wasteful number, since it uses less digits than its factorization.

87851115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59184 (or 59178 counting only the distinct ones).

The product of its digits is 11200, while the sum is 36.

The square root of 87851115 is about 9372.8925631312. The cubic root of 87851115 is about 444.5450300928.

The spelling of 87851115 in words is "eighty-seven million, eight hundred fifty-one thousand, one hundred fifteen".