43323431 has 2 divisors, whose sum is σ = 43323432. Its totient is φ = 43323430.

The previous prime is 43323407. The next prime is 43323437. The reversal of 43323431 is 13432334.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43323431 - 2⁶ = 43323367 is a prime.

It is a super-2 number, since 2×43323431² = 3753839347223522, 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 = 43323397 and 43323406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43323437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21661715 + 21661716.

It is an arithmetic number, because the mean of its divisors is an integer number (21661716).

Almost surely, 2^43323431 is an apocalyptic number.

43323431 is a deficient number, since it is larger than the sum of its proper divisors (1).

43323431 is an equidigital number, since it uses as much as digits as its factorization.

43323431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 23.

The square root of 43323431 is about 6582.0537068608. The cubic root of 43323431 is about 351.2159908478.

Adding to 43323431 its reverse (13432334), we get a palindrome (56755765).

The spelling of 43323431 in words is "forty-three million, three hundred twenty-three thousand, four hundred thirty-one".