43423631 has 2 divisors, whose sum is σ = 43423632. Its totient is φ = 43423630.

The previous prime is 43423619. The next prime is 43423651. The reversal of 43423631 is 13632434.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43423631 - 2²² = 39229327 is a prime.

It is a super-2 number, since 2×43423631² = 3771223458448322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 43423631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43423651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21711815 + 21711816.

It is an arithmetic number, because the mean of its divisors is an integer number (21711816).

Almost surely, 2^43423631 is an apocalyptic number.

43423631 is a deficient number, since it is larger than the sum of its proper divisors (1).

43423631 is an equidigital number, since it uses as much as digits as its factorization.

43423631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 26.

The square root of 43423631 is about 6589.6609169213. The cubic root of 43423631 is about 351.4865507218.

The spelling of 43423631 in words is "forty-three million, four hundred twenty-three thousand, six hundred thirty-one".