155103211 has 2 divisors, whose sum is σ = 155103212. Its totient is φ = 155103210.

The previous prime is 155103209. The next prime is 155103253. The reversal of 155103211 is 112301551.

It is a weak prime.

It is an emirp because it is prime and its reverse (112301551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 155103211 - 2¹ = 155103209 is a prime.

Together with 155103209, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (155173211) 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, 77551605 + 77551606.

It is an arithmetic number, because the mean of its divisors is an integer number (77551606).

Almost surely, 2^155103211 is an apocalyptic number.

155103211 is a deficient number, since it is larger than the sum of its proper divisors (1).

155103211 is an equidigital number, since it uses as much as digits as its factorization.

155103211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 150, while the sum is 19.

The square root of 155103211 is about 12454.0439617018. The cubic root of 155103211 is about 537.2877385063.

Adding to 155103211 its reverse (112301551), we get a palindrome (267404762).

It can be divided in two parts, 15510 and 3211, that added together give a triangular number (18721 = T₁₉₃).

The spelling of 155103211 in words is "one hundred fifty-five million, one hundred three thousand, two hundred eleven".