155044242 has 48 divisors (see below), whose sum is σ = 351711360. Its totient is φ = 49268736.

The previous prime is 155044229. The next prime is 155044243. The reversal of 155044242 is 242440551.

155044242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (155044243) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 201234 + ... + 202002.

It is an arithmetic number, because the mean of its divisors is an integer number (7327320).

Almost surely, 2^155044242 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155044242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (175855680).

155044242 is an abundant number, since it is smaller than the sum of its proper divisors (196667118).

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

155044242 is a wasteful number, since it uses less digits than its factorization.

155044242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1287 (or 1284 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

The square root of 155044242 is about 12451.6762726952. The cubic root of 155044242 is about 537.2196390419.

Adding to 155044242 its reverse (242440551), we get a palindrome (397484793).

The spelling of 155044242 in words is "one hundred fifty-five million, forty-four thousand, two hundred forty-two".