215065110989 has 2 divisors, whose sum is σ = 215065110990. Its totient is φ = 215065110988.

The previous prime is 215065110919. The next prime is 215065111097. The reversal of 215065110989 is 989011560512.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114142622500 + 100922488489 = 337850^2 + 317683^2 .

It is a cyclic number.

It is not a de Polignac number, because 215065110989 - 2¹⁶ = 215065045453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215065110919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107532555494 + 107532555495.

It is an arithmetic number, because the mean of its divisors is an integer number (107532555495).

Almost surely, 2^215065110989 is an apocalyptic number.

It is an amenable number.

215065110989 is a deficient number, since it is larger than the sum of its proper divisors (1).

215065110989 is an equidigital number, since it uses as much as digits as its factorization.

215065110989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 194400, while the sum is 47.

The spelling of 215065110989 in words is "two hundred fifteen billion, sixty-five million, one hundred ten thousand, nine hundred eighty-nine".