130043540 has 144 divisors (see below), whose sum is σ = 331808400. Its totient is φ = 42577920.

The previous prime is 130043539. The next prime is 130043549. The reversal of 130043540 is 45340031.

It can be written as a sum of positive squares in 8 ways, for example, as 4648336 + 125395204 = 2156^2 + 11198^2 .

It is a super-2 number, since 2×130043540² = 33822644591463200, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130043549) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1193006 + ... + 1193114.

It is an arithmetic number, because the mean of its divisors is an integer number (2304225).

Almost surely, 2^130043540 is an apocalyptic number.

130043540 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 130043540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165904200).

130043540 is an abundant number, since it is smaller than the sum of its proper divisors (201764860).

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

130043540 is a wasteful number, since it uses less digits than its factorization.

130043540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186 (or 173 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 130043540 is about 11403.6634464544. The cubic root of 130043540 is about 506.6362506749.

Adding to 130043540 its reverse (45340031), we get a palindrome (175383571).

The spelling of 130043540 in words is "one hundred thirty million, forty-three thousand, five hundred forty".