43532681 has 2 divisors, whose sum is σ = 43532682. Its totient is φ = 43532680.

The previous prime is 43532651. The next prime is 43532689. The reversal of 43532681 is 18623534.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29214025 + 14318656 = 5405^2 + 3784^2 .

It is a cyclic number.

It is not a de Polignac number, because 43532681 - 2¹⁸ = 43270537 is a prime.

It is a super-2 number, since 2×43532681² = 3790188630095522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (43532689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21766340 + 21766341.

It is an arithmetic number, because the mean of its divisors is an integer number (21766341).

Almost surely, 2^43532681 is an apocalyptic number.

It is an amenable number.

43532681 is a deficient number, since it is larger than the sum of its proper divisors (1).

43532681 is an equidigital number, since it uses as much as digits as its factorization.

43532681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 32.

The square root of 43532681 is about 6597.9300541912. The cubic root of 43532681 is about 351.7805347913.

The spelling of 43532681 in words is "forty-three million, five hundred thirty-two thousand, six hundred eighty-one".