155211222205 has 16 divisors (see below), whose sum is σ = 211137534720. Its totient is φ = 108585016128.

The previous prime is 155211222197. The next prime is 155211222209. The reversal of 155211222205 is 502222112551.

155211222205 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 155211222205 - 2³ = 155211222197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155211222209) 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 in 15 ways as a sum of consecutive naturals, for example, 62837317 + ... + 62839786.

It is an arithmetic number, because the mean of its divisors is an integer number (13196095920).

Almost surely, 2^155211222205 is an apocalyptic number.

It is an amenable number.

155211222205 is a deficient number, since it is larger than the sum of its proper divisors (55926312515).

155211222205 is a wasteful number, since it uses less digits than its factorization.

155211222205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125677140.

The product of its (nonzero) digits is 4000, while the sum is 28.

Adding to 155211222205 its reverse (502222112551), we get a palindrome (657433334756).

The spelling of 155211222205 in words is "one hundred fifty-five billion, two hundred eleven million, two hundred twenty-two thousand, two hundred five".