43391332 has 6 divisors (see below), whose sum is σ = 75934838. Its totient is φ = 21695664.

The previous prime is 43391323. The next prime is 43391339. The reversal of 43391332 is 23319334.

It can be written as a sum of positive squares in only one way, i.e., 41912676 + 1478656 = 6474^2 + 1216^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 43391332.

It is not an unprimeable number, because it can be changed into a prime (43391339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5423913 + ... + 5423920.

Almost surely, 2^43391332 is an apocalyptic number.

It is an amenable number.

43391332 is a deficient number, since it is larger than the sum of its proper divisors (32543506).

43391332 is a wasteful number, since it uses less digits than its factorization.

43391332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10847837 (or 10847835 counting only the distinct ones).

The product of its digits is 5832, while the sum is 28.

The square root of 43391332 is about 6587.2097279501. The cubic root of 43391332 is about 351.3993825160.

It can be divided in two parts, 4339 and 1332, that added together give a triangular number (5671 = T₁₀₆).

The spelling of 43391332 in words is "forty-three million, three hundred ninety-one thousand, three hundred thirty-two".