155212103 has 2 divisors, whose sum is σ = 155212104. Its totient is φ = 155212102.

The previous prime is 155212093. The next prime is 155212117. The reversal of 155212103 is 301212551.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 155212103 - 2⁴ = 155212087 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154212103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77606051 + 77606052.

It is an arithmetic number, because the mean of its divisors is an integer number (77606052).

Almost surely, 2^155212103 is an apocalyptic number.

155212103 is a deficient number, since it is larger than the sum of its proper divisors (1).

155212103 is an equidigital number, since it uses as much as digits as its factorization.

155212103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 155212103 is about 12458.4149473358. The cubic root of 155212103 is about 537.4134454462.

Adding to 155212103 its reverse (301212551), we get a palindrome (456424654).

The spelling of 155212103 in words is "one hundred fifty-five million, two hundred twelve thousand, one hundred three".