43500131 has 2 divisors, whose sum is σ = 43500132. Its totient is φ = 43500130.

The previous prime is 43500113. The next prime is 43500157. The reversal of 43500131 is 13100534.

43500131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (43500113) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43500131 is a prime.

It is a super-2 number, since 2×43500131² = 3784522794034322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (43500181) 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 as a sum of consecutive naturals, namely, 21750065 + 21750066.

It is an arithmetic number, because the mean of its divisors is an integer number (21750066).

Almost surely, 2^43500131 is an apocalyptic number.

43500131 is a deficient number, since it is larger than the sum of its proper divisors (1).

43500131 is an equidigital number, since it uses as much as digits as its factorization.

43500131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 43500131 is about 6595.4629102134. The cubic root of 43500131 is about 351.6928358395.

Adding to 43500131 its reverse (13100534), we get a palindrome (56600665).

The spelling of 43500131 in words is "forty-three million, five hundred thousand, one hundred thirty-one".