287224085 has 4 divisors (see below), whose sum is σ = 344668908. Its totient is φ = 229779264.

The previous prime is 287224057. The next prime is 287224111. The reversal of 287224085 is 580422782.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 580422782 = 2 ⋅290211391.

It can be written as a sum of positive squares in 2 ways, for example, as 96314596 + 190909489 = 9814^2 + 13817^2 .

It is a cyclic number.

It is not a de Polignac number, because 287224085 - 2²² = 283029781 is a prime.

It is a Duffinian number.

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 3 ways as a sum of consecutive naturals, for example, 28722404 + ... + 28722413.

It is an arithmetic number, because the mean of its divisors is an integer number (86167227).

Almost surely, 2^287224085 is an apocalyptic number.

It is an amenable number.

287224085 is a deficient number, since it is larger than the sum of its proper divisors (57444823).

287224085 is an equidigital number, since it uses as much as digits as its factorization.

287224085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57444822.

The product of its (nonzero) digits is 71680, while the sum is 38.

The square root of 287224085 is about 16947.6867153013. The cubic root of 287224085 is about 659.7918573835.

The spelling of 287224085 in words is "two hundred eighty-seven million, two hundred twenty-four thousand, eighty-five".