155123143 has 16 divisors (see below), whose sum is σ = 181522944. Its totient is φ = 129820320.

The previous prime is 155123141. The next prime is 155123149. The reversal of 155123143 is 341321551.

It is a happy number.

It is not a de Polignac number, because 155123143 - 2¹ = 155123141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155123141) 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 in 15 ways as a sum of consecutive naturals, for example, 51721 + ... + 54637.

It is an arithmetic number, because the mean of its divisors is an integer number (11345184).

Almost surely, 2^155123143 is an apocalyptic number.

155123143 is a deficient number, since it is larger than the sum of its proper divisors (26399801).

155123143 is a wasteful number, since it uses less digits than its factorization.

155123143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3102.

The product of its digits is 1800, while the sum is 25.

The square root of 155123143 is about 12454.8441579973. The cubic root of 155123143 is about 537.3107527740.

Adding to 155123143 its reverse (341321551), we get a palindrome (496444694).

The spelling of 155123143 in words is "one hundred fifty-five million, one hundred twenty-three thousand, one hundred forty-three".