43231689931 has 2 divisors, whose sum is σ = 43231689932. Its totient is φ = 43231689930.

The previous prime is 43231689869. The next prime is 43231689967. The reversal of 43231689931 is 13998613234.

43231689931 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43231689931 - 2¹⁷ = 43231558859 is a prime.

It is a super-2 number, since 2×43231689931² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (43231680931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21615844965 + 21615844966.

It is an arithmetic number, because the mean of its divisors is an integer number (21615844966).

Almost surely, 2^43231689931 is an apocalyptic number.

43231689931 is a deficient number, since it is larger than the sum of its proper divisors (1).

43231689931 is an equidigital number, since it uses as much as digits as its factorization.

43231689931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 839808, while the sum is 49.

The spelling of 43231689931 in words is "forty-three billion, two hundred thirty-one million, six hundred eighty-nine thousand, nine hundred thirty-one".