287313265 has 16 divisors (see below), whose sum is σ = 352124496. Its totient is φ = 224972800.

The previous prime is 287313259. The next prime is 287313289. The reversal of 287313265 is 562313782.

It can be written as a sum of positive squares in 8 ways, for example, as 4669921 + 282643344 = 2161^2 + 16812^2 .

It is not a de Polignac number, because 287313265 - 2⁷ = 287313137 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137025 + ... + 139105.

It is an arithmetic number, because the mean of its divisors is an integer number (22007781).

Almost surely, 2^287313265 is an apocalyptic number.

It is an amenable number.

287313265 is a deficient number, since it is larger than the sum of its proper divisors (64811231).

287313265 is a wasteful number, since it uses less digits than its factorization.

287313265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2660.

The product of its digits is 60480, while the sum is 37.

The square root of 287313265 is about 16950.3175486479. The cubic root of 287313265 is about 659.8601364175.

The spelling of 287313265 in words is "two hundred eighty-seven million, three hundred thirteen thousand, two hundred sixty-five".