155081903 has 2 divisors, whose sum is σ = 155081904. Its totient is φ = 155081902.

The previous prime is 155081891. The next prime is 155081917. The reversal of 155081903 is 309180551.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 155081903 - 2¹² = 155077807 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 155081903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155080903) 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, 77540951 + 77540952.

It is an arithmetic number, because the mean of its divisors is an integer number (77540952).

Almost surely, 2^155081903 is an apocalyptic number.

155081903 is a deficient number, since it is larger than the sum of its proper divisors (1).

155081903 is an equidigital number, since it uses as much as digits as its factorization.

155081903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 32.

The square root of 155081903 is about 12453.1884672159. The cubic root of 155081903 is about 537.2631332743.

The spelling of 155081903 in words is "one hundred fifty-five million, eighty-one thousand, nine hundred three".