43472431 has 2 divisors, whose sum is σ = 43472432. Its totient is φ = 43472430.

The previous prime is 43472413. The next prime is 43472467. The reversal of 43472431 is 13427434.

Together with previous prime (43472413) 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-43472431 is a prime.

It is a super-2 number, since 2×43472431² = 3779704514099522, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43472431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43472491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21736215 + 21736216.

It is an arithmetic number, because the mean of its divisors is an integer number (21736216).

Almost surely, 2^43472431 is an apocalyptic number.

43472431 is a deficient number, since it is larger than the sum of its proper divisors (1).

43472431 is an equidigital number, since it uses as much as digits as its factorization.

43472431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 28.

The square root of 43472431 is about 6593.3626473902. The cubic root of 43472431 is about 351.6181697034.

Adding to 43472431 its reverse (13427434), we get a palindrome (56899865).

The spelling of 43472431 in words is "forty-three million, four hundred seventy-two thousand, four hundred thirty-one".