215120089 has 2 divisors, whose sum is σ = 215120090. Its totient is φ = 215120088.

The previous prime is 215120083. The next prime is 215120117. The reversal of 215120089 is 980021512.

It is an a-pointer prime, because the next prime (215120117) can be obtained adding 215120089 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116812864 + 98307225 = 10808^2 + 9915^2 .

It is a cyclic number.

It is not a de Polignac number, because 215120089 - 2¹¹ = 215118041 is a prime.

It is not a weakly prime, because it can be changed into another prime (215120083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107560044 + 107560045.

It is an arithmetic number, because the mean of its divisors is an integer number (107560045).

Almost surely, 2^215120089 is an apocalyptic number.

It is an amenable number.

215120089 is a deficient number, since it is larger than the sum of its proper divisors (1).

215120089 is an equidigital number, since it uses as much as digits as its factorization.

215120089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 215120089 is about 14666.9727278672. The cubic root of 215120089 is about 599.1841587672.

The spelling of 215120089 in words is "two hundred fifteen million, one hundred twenty thousand, eighty-nine".