215273089 has 2 divisors, whose sum is σ = 215273090. Its totient is φ = 215273088.

The previous prime is 215273063. The next prime is 215273099. The reversal of 215273089 is 980372512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 209670400 + 5602689 = 14480^2 + 2367^2 .

It is a cyclic number.

It is not a de Polignac number, because 215273089 - 2¹⁷ = 215142017 is a prime.

It is not a weakly prime, because it can be changed into another prime (215273029) 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, 107636544 + 107636545.

It is an arithmetic number, because the mean of its divisors is an integer number (107636545).

Almost surely, 2^215273089 is an apocalyptic number.

It is an amenable number.

215273089 is a deficient number, since it is larger than the sum of its proper divisors (1).

215273089 is an equidigital number, since it uses as much as digits as its factorization.

215273089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 215273089 is about 14672.1876010362. The cubic root of 215273089 is about 599.3261778153.

The spelling of 215273089 in words is "two hundred fifteen million, two hundred seventy-three thousand, eighty-nine".