155112140 has 48 divisors (see below), whose sum is σ = 336232512. Its totient is φ = 60062976.

The previous prime is 155112119. The next prime is 155112157. The reversal of 155112140 is 41211551.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 194222 + ... + 195018.

It is an arithmetic number, because the mean of its divisors is an integer number (7004844).

Almost surely, 2^155112140 is an apocalyptic number.

155112140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155112140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (168116256).

155112140 is an abundant number, since it is smaller than the sum of its proper divisors (181120372).

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

155112140 is a wasteful number, since it uses less digits than its factorization.

155112140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1106 (or 1104 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 20.

The square root of 155112140 is about 12454.4024344807. The cubic root of 155112140 is about 537.2980485231.

Adding to 155112140 its reverse (41211551), we get a palindrome (196323691).

The spelling of 155112140 in words is "one hundred fifty-five million, one hundred twelve thousand, one hundred forty".