43487231 has 2 divisors, whose sum is σ = 43487232. Its totient is φ = 43487230.

The previous prime is 43487201. The next prime is 43487237. The reversal of 43487231 is 13278434.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43487231 - 2⁶ = 43487167 is a prime.

It is a super-2 number, since 2×43487231² = 3782278520094722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43487237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21743615 + 21743616.

It is an arithmetic number, because the mean of its divisors is an integer number (21743616).

Almost surely, 2^43487231 is an apocalyptic number.

43487231 is a deficient number, since it is larger than the sum of its proper divisors (1).

43487231 is an equidigital number, since it uses as much as digits as its factorization.

43487231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 32.

The square root of 43487231 is about 6594.4848926963. The cubic root of 43487231 is about 351.6580674682.

The spelling of 43487231 in words is "forty-three million, four hundred eighty-seven thousand, two hundred thirty-one".