43731731 has 16 divisors (see below), whose sum is σ = 47139840. Its totient is φ = 40491360.

The previous prime is 43731719. The next prime is 43731767. The reversal of 43731731 is 13713734.

43731731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43731731 is a prime.

It is a super-2 number, since 2×43731731² = 3824928592512722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 43731694 and 43731703.

It is not an unprimeable number, because it can be changed into a prime (43731031) 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 15 ways as a sum of consecutive naturals, for example, 70340 + ... + 70958.

It is an arithmetic number, because the mean of its divisors is an integer number (2946240).

Almost surely, 2^43731731 is an apocalyptic number.

43731731 is a deficient number, since it is larger than the sum of its proper divisors (3408109).

43731731 is a wasteful number, since it uses less digits than its factorization.

43731731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 746.

The product of its digits is 5292, while the sum is 29.

The square root of 43731731 is about 6612.9971268707. The cubic root of 43731731 is about 352.3158832603.

The spelling of 43731731 in words is "forty-three million, seven hundred thirty-one thousand, seven hundred thirty-one".