155140140 has 96 divisors (see below), whose sum is σ = 452954880. Its totient is φ = 39626496.

The previous prime is 155140133. The next prime is 155140157. The reversal of 155140140 is 41041551.

155140140 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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, 283347 + ... + 283893.

It is an arithmetic number, because the mean of its divisors is an integer number (4718280).

Almost surely, 2^155140140 is an apocalyptic number.

155140140 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 155140140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (226477440).

155140140 is an abundant number, since it is smaller than the sum of its proper divisors (297814740).

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

155140140 is a wasteful number, since it uses less digits than its factorization.

155140140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 751 (or 749 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 155140140 is about 12455.5264842559. The cubic root of 155140140 is about 537.3303766186.

Adding to 155140140 its reverse (41041551), we get a palindrome (196181691).

It can be divided in two parts, 1551401 and 40, that added together give a triangular number (1551441 = T₁₇₆₁).

The spelling of 155140140 in words is "one hundred fifty-five million, one hundred forty thousand, one hundred forty".