155130240 has 128 divisors (see below), whose sum is σ = 506246400. Its totient is φ = 40384512.

The previous prime is 155130229. The next prime is 155130263. The reversal of 155130240 is 42031551.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

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, 81621 + ... + 83499.

It is an arithmetic number, because the mean of its divisors is an integer number (3955050).

Almost surely, 2^155130240 is an apocalyptic number.

155130240 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 155130240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (253123200).

155130240 is an abundant number, since it is smaller than the sum of its proper divisors (351116160).

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

155130240 is a wasteful number, since it uses less digits than its factorization.

155130240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1944 (or 1932 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 155130240 is about 12455.1290639640. The cubic root of 155130240 is about 537.3189467722.

Adding to 155130240 its reverse (42031551), we get a palindrome (197161791).

The spelling of 155130240 in words is "one hundred fifty-five million, one hundred thirty thousand, two hundred forty".