43132540 has 48 divisors (see below), whose sum is σ = 100517760. Its totient is φ = 15414080.

The previous prime is 43132517. The next prime is 43132547. The reversal of 43132540 is 4523134.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43132547) 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, 11319 + ... + 14641.

It is an arithmetic number, because the mean of its divisors is an integer number (2094120).

Almost surely, 2^43132540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43132540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50258880).

43132540 is an abundant number, since it is smaller than the sum of its proper divisors (57385220).

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

43132540 is a wasteful number, since it uses less digits than its factorization.

43132540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3402 (or 3400 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 43132540 is about 6567.5368289793. The cubic root of 43132540 is about 350.6993906212.

Adding to 43132540 its reverse (4523134), we get a palindrome (47655674).

The spelling of 43132540 in words is "forty-three million, one hundred thirty-two thousand, five hundred forty".