155436123 has 16 divisors (see below), whose sum is σ = 209298176. Its totient is φ = 102604320.

The previous prime is 155436109. The next prime is 155436163. The reversal of 155436123 is 321634551.

It is not a de Polignac number, because 155436123 - 2⁴ = 155436107 is a prime.

It is a super-2 number, since 2×155436123² = 48320776666542258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155436163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 246018 + ... + 246648.

It is an arithmetic number, because the mean of its divisors is an integer number (13081136).

Almost surely, 2^155436123 is an apocalyptic number.

155436123 is a deficient number, since it is larger than the sum of its proper divisors (53862053).

155436123 is a wasteful number, since it uses less digits than its factorization.

155436123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1314.

The product of its digits is 10800, while the sum is 30.

The square root of 155436123 is about 12467.4024159004. The cubic root of 155436123 is about 537.6718735009.

The spelling of 155436123 in words is "one hundred fifty-five million, four hundred thirty-six thousand, one hundred twenty-three".