155112005 has 8 divisors (see below), whose sum is σ = 186948600. Its totient is φ = 123546816.

The previous prime is 155111987. The next prime is 155112007. The reversal of 155112005 is 500211551.

It is a happy number.

155112005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 37736449 + 117375556 = 6143^2 + 10834^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 155112005 - 2¹⁸ = 154849861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155112007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66590 + ... + 68879.

It is an arithmetic number, because the mean of its divisors is an integer number (23368575).

Almost surely, 2^155112005 is an apocalyptic number.

It is an amenable number.

155112005 is a deficient number, since it is larger than the sum of its proper divisors (31836595).

155112005 is a wasteful number, since it uses less digits than its factorization.

155112005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135703.

The product of its (nonzero) digits is 250, while the sum is 20.

The square root of 155112005 is about 12454.3970147093. The cubic root of 155112005 is about 537.2978926461.

Adding to 155112005 its reverse (500211551), we get a palindrome (655323556).

The spelling of 155112005 in words is "one hundred fifty-five million, one hundred twelve thousand, five".