155031103 has 2 divisors, whose sum is σ = 155031104. Its totient is φ = 155031102.

The previous prime is 155031067. The next prime is 155031113. The reversal of 155031103 is 301130551.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155031103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155031113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77515551 + 77515552.

It is an arithmetic number, because the mean of its divisors is an integer number (77515552).

Almost surely, 2^155031103 is an apocalyptic number.

155031103 is a deficient number, since it is larger than the sum of its proper divisors (1).

155031103 is an equidigital number, since it uses as much as digits as its factorization.

155031103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 225, while the sum is 19.

The square root of 155031103 is about 12451.1486618705. The cubic root of 155031103 is about 537.2044633129.

Adding to 155031103 its reverse (301130551), we get a palindrome (456161654).

The spelling of 155031103 in words is "one hundred fifty-five million, thirty-one thousand, one hundred three".