220144909 has 2 divisors, whose sum is σ = 220144910. Its totient is φ = 220144908.

The previous prime is 220144901. The next prime is 220144927. The reversal of 220144909 is 909441022.

It is a happy number.

220144909 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 218389284 + 1755625 = 14778^2 + 1325^2 .

It is a cyclic number.

It is not a de Polignac number, because 220144909 - 2³ = 220144901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220144901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110072454 + 110072455.

It is an arithmetic number, because the mean of its divisors is an integer number (110072455).

Almost surely, 2^220144909 is an apocalyptic number.

It is an amenable number.

220144909 is a deficient number, since it is larger than the sum of its proper divisors (1).

220144909 is an equidigital number, since it uses as much as digits as its factorization.

220144909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 220144909 is about 14837.2810514595. The cubic root of 220144909 is about 603.8135882570.

The spelling of 220144909 in words is "two hundred twenty million, one hundred forty-four thousand, nine hundred nine".