155013123 has 16 divisors (see below), whose sum is σ = 228358656. Its totient is φ = 93033600.

The previous prime is 155013109. The next prime is 155013167. The reversal of 155013123 is 321310551.

It is not a de Polignac number, because 155013123 - 2⁸ = 155012867 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 155013123.

It is not an unprimeable number, because it can be changed into a prime (155013223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64903 + ... + 67248.

It is an arithmetic number, because the mean of its divisors is an integer number (14272416).

Almost surely, 2^155013123 is an apocalyptic number.

155013123 is a deficient number, since it is larger than the sum of its proper divisors (73345533).

155013123 is a wasteful number, since it uses less digits than its factorization.

155013123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132194.

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 155013123 is about 12450.4266191966. The cubic root of 155013123 is about 537.1836947714.

Adding to 155013123 its reverse (321310551), we get a palindrome (476323674).

The spelling of 155013123 in words is "one hundred fifty-five million, thirteen thousand, one hundred twenty-three".