155220588209 has 2 divisors, whose sum is σ = 155220588210. Its totient is φ = 155220588208.

The previous prime is 155220588191. The next prime is 155220588251. The reversal of 155220588209 is 902885022551.

155220588209 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., 150042346609 + 5178241600 = 387353^2 + 71960^2 .

It is an emirp because it is prime and its reverse (902885022551) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155220588209 is a prime.

It is not a weakly prime, because it can be changed into another prime (155220581209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77610294104 + 77610294105.

It is an arithmetic number, because the mean of its divisors is an integer number (77610294105).

Almost surely, 2^155220588209 is an apocalyptic number.

It is an amenable number.

155220588209 is a deficient number, since it is larger than the sum of its proper divisors (1).

155220588209 is an equidigital number, since it uses as much as digits as its factorization.

155220588209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576000, while the sum is 47.

The spelling of 155220588209 in words is "one hundred fifty-five billion, two hundred twenty million, five hundred eighty-eight thousand, two hundred nine".