288250021 has 2 divisors, whose sum is σ = 288250022. Its totient is φ = 288250020.

The previous prime is 288250019. The next prime is 288250037. The reversal of 288250021 is 120052882.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 238702500 + 49547521 = 15450^2 + 7039^2 .

It is a cyclic number.

It is not a de Polignac number, because 288250021 - 2¹ = 288250019 is a prime.

Together with 288250019, 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 (288250621) by changing a digit.

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 as a sum of consecutive naturals, namely, 144125010 + 144125011.

It is an arithmetic number, because the mean of its divisors is an integer number (144125011).

Almost surely, 2^288250021 is an apocalyptic number.

It is an amenable number.

288250021 is a deficient number, since it is larger than the sum of its proper divisors (1).

288250021 is an equidigital number, since it uses as much as digits as its factorization.

288250021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 288250021 is about 16977.9274647997. The cubic root of 288250021 is about 660.5764943097.

The spelling of 288250021 in words is "two hundred eighty-eight million, two hundred fifty thousand, twenty-one".