288215887 has 2 divisors, whose sum is σ = 288215888. Its totient is φ = 288215886.

The previous prime is 288215881. The next prime is 288215951. The reversal of 288215887 is 788512882.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-288215887 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 288215887.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (288215881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144107943 + 144107944.

It is an arithmetic number, because the mean of its divisors is an integer number (144107944).

Almost surely, 2^288215887 is an apocalyptic number.

288215887 is a deficient number, since it is larger than the sum of its proper divisors (1).

288215887 is an equidigital number, since it uses as much as digits as its factorization.

288215887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 573440, while the sum is 49.

The square root of 288215887 is about 16976.9221886654. The cubic root of 288215887 is about 660.5504185578.

It can be divided in two parts, 2882 and 15887, that added together give a square (18769 = 137²).

The spelling of 288215887 in words is "two hundred eighty-eight million, two hundred fifteen thousand, eight hundred eighty-seven".