155143040 has 128 divisors (see below), whose sum is σ = 413834400. Its totient is φ = 55222272.

The previous prime is 155143033. The next prime is 155143049. The reversal of 155143040 is 40341551.

155143040 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 155142997 and 155143015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155143049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 240959 + ... + 241601.

Almost surely, 2^155143040 is an apocalyptic number.

155143040 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 155143040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (206917200).

155143040 is an abundant number, since it is smaller than the sum of its proper divisors (258691360).

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

155143040 is a wasteful number, since it uses less digits than its factorization.

155143040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704 (or 692 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 155143040 is about 12455.6428978997. The cubic root of 155143040 is about 537.3337246633. Note that the first 3 decimals are identical.

Adding to 155143040 its reverse (40341551), we get a palindrome (195484591).

The spelling of 155143040 in words is "one hundred fifty-five million, one hundred forty-three thousand, forty".