216240589 has 2 divisors, whose sum is σ = 216240590. Its totient is φ = 216240588.

The previous prime is 216240581. The next prime is 216240611. The reversal of 216240589 is 985042612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117397225 + 98843364 = 10835^2 + 9942^2 .

It is a cyclic number.

It is not a de Polignac number, because 216240589 - 2³ = 216240581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216240581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108120294 + 108120295.

It is an arithmetic number, because the mean of its divisors is an integer number (108120295).

Almost surely, 2^216240589 is an apocalyptic number.

It is an amenable number.

216240589 is a deficient number, since it is larger than the sum of its proper divisors (1).

216240589 is an equidigital number, since it uses as much as digits as its factorization.

216240589 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 216240589 is about 14705.1211827717. The cubic root of 216240589 is about 600.2226849347. Note that the first 3 decimals are identical.

The spelling of 216240589 in words is "two hundred sixteen million, two hundred forty thousand, five hundred eighty-nine".