220040399209 has 2 divisors, whose sum is σ = 220040399210. Its totient is φ = 220040399208.

The previous prime is 220040399191. The next prime is 220040399233. The reversal of 220040399209 is 902993040022.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126969643584 + 93070755625 = 356328^2 + 305075^2 .

It is a cyclic number.

It is not a de Polignac number, because 220040399209 - 2¹⁹ = 220039874921 is a prime.

It is not a weakly prime, because it can be changed into another prime (220041399209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110020199604 + 110020199605.

It is an arithmetic number, because the mean of its divisors is an integer number (110020199605).

Almost surely, 2^220040399209 is an apocalyptic number.

It is an amenable number.

220040399209 is a deficient number, since it is larger than the sum of its proper divisors (1).

220040399209 is an equidigital number, since it uses as much as digits as its factorization.

220040399209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 40.

The spelling of 220040399209 in words is "two hundred twenty billion, forty million, three hundred ninety-nine thousand, two hundred nine".