43661532 has 24 divisors (see below), whose sum is σ = 101984400. Its totient is φ = 14538496.

The previous prime is 43661509. The next prime is 43661533. The reversal of 43661532 is 23516634.

43661532 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 43661532.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43661533) 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 7 ways as a sum of consecutive naturals, for example, 19444 + ... + 21572.

It is an arithmetic number, because the mean of its divisors is an integer number (4249350).

Almost surely, 2^43661532 is an apocalyptic number.

It is an amenable number.

43661532 is an abundant number, since it is smaller than the sum of its proper divisors (58322868).

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

43661532 is a wasteful number, since it uses less digits than its factorization.

43661532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3845 (or 3843 counting only the distinct ones).

The product of its digits is 12960, while the sum is 30.

The square root of 43661532 is about 6607.6873412715. The cubic root of 43661532 is about 352.1272675993.

The spelling of 43661532 in words is "forty-three million, six hundred sixty-one thousand, five hundred thirty-two".