155100042 has 64 divisors (see below), whose sum is σ = 353295360. Its totient is φ = 50423472.

The previous prime is 155100013. The next prime is 155100073. The reversal of 155100042 is 240001551.

155100042 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 155099988 and 155100024.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 589603 + ... + 589865.

It is an arithmetic number, because the mean of its divisors is an integer number (5520240).

Almost surely, 2^155100042 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155100042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (176647680).

155100042 is an abundant number, since it is smaller than the sum of its proper divisors (198195318).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155100042 is a wasteful number, since it uses less digits than its factorization.

155100042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504 (or 498 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 155100042 is about 12453.9167333012. The cubic root of 155100042 is about 537.2840792731.

Adding to 155100042 its reverse (240001551), we get a palindrome (395101593).

The spelling of 155100042 in words is "one hundred fifty-five million, one hundred thousand, forty-two".