43985231 has 2 divisors, whose sum is σ = 43985232. Its totient is φ = 43985230.

The previous prime is 43985213. The next prime is 43985237. The reversal of 43985231 is 13258934.

Together with previous prime (43985213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43985231 - 2⁶ = 43985167 is a prime.

It is a super-2 number, since 2×43985231² = 3869401092246722, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 43985191 and 43985200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43985237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21992615 + 21992616.

It is an arithmetic number, because the mean of its divisors is an integer number (21992616).

Almost surely, 2^43985231 is an apocalyptic number.

43985231 is a deficient number, since it is larger than the sum of its proper divisors (1).

43985231 is an equidigital number, since it uses as much as digits as its factorization.

43985231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 35.

The square root of 43985231 is about 6632.1362320145. The cubic root of 43985231 is about 352.9953293285.

The spelling of 43985231 in words is "forty-three million, nine hundred eighty-five thousand, two hundred thirty-one".