287205223 has 2 divisors, whose sum is σ = 287205224. Its totient is φ = 287205222.

The previous prime is 287205221. The next prime is 287205229. The reversal of 287205223 is 322502782.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 287205223 - 2¹ = 287205221 is a prime.

Together with 287205221, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (287205221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 143602611 + 143602612.

It is an arithmetic number, because the mean of its divisors is an integer number (143602612).

Almost surely, 2^287205223 is an apocalyptic number.

287205223 is a deficient number, since it is larger than the sum of its proper divisors (1).

287205223 is an equidigital number, since it uses as much as digits as its factorization.

287205223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 287205223 is about 16947.1302290388. The cubic root of 287205223 is about 659.7774142279. Note that the first 3 decimals are identical.

The spelling of 287205223 in words is "two hundred eighty-seven million, two hundred five thousand, two hundred twenty-three".