155144140 has 12 divisors (see below), whose sum is σ = 325802736. Its totient is φ = 62057648.

The previous prime is 155144137. The next prime is 155144147. The reversal of 155144140 is 41441551.

155144140 is digitally balanced in base 3, 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 (155144147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3878584 + ... + 3878623.

It is an arithmetic number, because the mean of its divisors is an integer number (27150228).

Almost surely, 2^155144140 is an apocalyptic number.

155144140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155144140 is an abundant number, since it is smaller than the sum of its proper divisors (170658596).

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

155144140 is a wasteful number, since it uses less digits than its factorization.

155144140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7757216 (or 7757214 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 155144140 is about 12455.6870545145. The cubic root of 155144140 is about 537.3349946004.

Adding to 155144140 its reverse (41441551), we get a palindrome (196585691).

The spelling of 155144140 in words is "one hundred fifty-five million, one hundred forty-four thousand, one hundred forty".