87855133 has 6 divisors (see below), whose sum is σ = 93327386. Its totient is φ = 82686912.

The previous prime is 87855113. The next prime is 87855137. The reversal of 87855133 is 33155878.

It can be written as a sum of positive squares in 3 ways, for example, as 34082244 + 53772889 = 5838^2 + 7333^2 .

It is a de Polignac number, because none of the positive numbers 2^k-87855133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87855137) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 151710 + ... + 152287.

Almost surely, 2^87855133 is an apocalyptic number.

It is an amenable number.

87855133 is a deficient number, since it is larger than the sum of its proper divisors (5472253).

87855133 is a wasteful number, since it uses less digits than its factorization.

87855133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304031 (or 304014 counting only the distinct ones).

The product of its digits is 100800, while the sum is 40.

The square root of 87855133 is about 9373.1069021963. The cubic root of 87855133 is about 444.5518072964.

The spelling of 87855133 in words is "eighty-seven million, eight hundred fifty-five thousand, one hundred thirty-three".