155005423 has 2 divisors, whose sum is σ = 155005424. Its totient is φ = 155005422.

The previous prime is 155005399. The next prime is 155005427. The reversal of 155005423 is 324500551.

It is a strong prime.

It is an emirp because it is prime and its reverse (324500551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 155005423 - 2⁵ = 155005391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155005427) 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, 77502711 + 77502712.

It is an arithmetic number, because the mean of its divisors is an integer number (77502712).

Almost surely, 2^155005423 is an apocalyptic number.

155005423 is a deficient number, since it is larger than the sum of its proper divisors (1).

155005423 is an equidigital number, since it uses as much as digits as its factorization.

155005423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 155005423 is about 12450.1173890048. The cubic root of 155005423 is about 537.1748000773.

Adding to 155005423 its reverse (324500551), we get a palindrome (479505974).

The spelling of 155005423 in words is "one hundred fifty-five million, five thousand, four hundred twenty-three".