43345231 has 2 divisors, whose sum is σ = 43345232. Its totient is φ = 43345230.

The previous prime is 43345219. The next prime is 43345243. The reversal of 43345231 is 13254334.

It is a balanced prime because it is at equal distance from previous prime (43345219) and next prime (43345243).

It is a cyclic number.

It is not a de Polignac number, because 43345231 - 2⁵ = 43345199 is a prime.

It is a super-2 number, since 2×43345231² = 3757618100886722, which contains 22 as substring.

It is equal to p_2624155 and since 43345231 and 2624155 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 43345196 and 43345205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43345201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21672615 + 21672616.

It is an arithmetic number, because the mean of its divisors is an integer number (21672616).

Almost surely, 2^43345231 is an apocalyptic number.

43345231 is a deficient number, since it is larger than the sum of its proper divisors (1).

43345231 is an equidigital number, since it uses as much as digits as its factorization.

43345231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 25.

The square root of 43345231 is about 6583.7095166783. The cubic root of 43345231 is about 351.2748906514.

Adding to 43345231 its reverse (13254334), we get a palindrome (56599565).

The spelling of 43345231 in words is "forty-three million, three hundred forty-five thousand, two hundred thirty-one".