155030140 has 48 divisors (see below), whose sum is σ = 346508064. Its totient is φ = 58060800.

The previous prime is 155030131. The next prime is 155030147. The reversal of 155030140 is 41030551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155030147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70660 + ... + 72820.

It is an arithmetic number, because the mean of its divisors is an integer number (7218918).

Almost surely, 2^155030140 is an apocalyptic number.

155030140 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 155030140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (173254032).

155030140 is an abundant number, since it is smaller than the sum of its proper divisors (191477924).

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

155030140 is a wasteful number, since it uses less digits than its factorization.

155030140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2398 (or 2396 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 155030140 is about 12451.1099906795. The cubic root of 155030140 is about 537.2033510006.

Adding to 155030140 its reverse (41030551), we get a palindrome (196060691).

The spelling of 155030140 in words is "one hundred fifty-five million, thirty thousand, one hundred forty".