215255089 has 12 divisors (see below), whose sum is σ = 250658868. Its totient is φ = 184312800.

The previous prime is 215255083. The next prime is 215255093. The reversal of 215255089 is 980552512.

It can be written as a sum of positive squares in 2 ways, for example, as 50979600 + 164275489 = 7140^2 + 12817^2 .

It is not a de Polignac number, because 215255089 - 2⁵ = 215255057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215255083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66079 + ... + 69259.

It is an arithmetic number, because the mean of its divisors is an integer number (20888239).

Almost surely, 2^215255089 is an apocalyptic number.

It is an amenable number.

215255089 is a deficient number, since it is larger than the sum of its proper divisors (35403779).

215255089 is a wasteful number, since it uses less digits than its factorization.

215255089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4576 (or 4569 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 37.

The square root of 215255089 is about 14671.5741827522. The cubic root of 215255089 is about 599.3094731853.

The spelling of 215255089 in words is "two hundred fifteen million, two hundred fifty-five thousand, eighty-nine".