40223431 has 2 divisors, whose sum is σ = 40223432. Its totient is φ = 40223430.

The previous prime is 40223423. The next prime is 40223441. The reversal of 40223431 is 13432204.

40223431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40223431 - 2³ = 40223423 is a prime.

It is a super-2 number, since 2×40223431² = 3235848802823522, 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 = 40223399 and 40223408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40223441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20111715 + 20111716.

It is an arithmetic number, because the mean of its divisors is an integer number (20111716).

Almost surely, 2^40223431 is an apocalyptic number.

40223431 is a deficient number, since it is larger than the sum of its proper divisors (1).

40223431 is an equidigital number, since it uses as much as digits as its factorization.

40223431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 40223431 is about 6342.1944940218. The cubic root of 40223431 is about 342.6307767770.

Adding to 40223431 its reverse (13432204), we get a palindrome (53655635).

The spelling of 40223431 in words is "forty million, two hundred twenty-three thousand, four hundred thirty-one".