40243223 has 2 divisors, whose sum is σ = 40243224. Its totient is φ = 40243222.

The previous prime is 40243211. The next prime is 40243243. The reversal of 40243223 is 32234204.

It is an a-pointer prime, because the next prime (40243243) can be obtained adding 40243223 to its sum of digits (20).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40243223 - 2¹² = 40239127 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40243195 and 40243204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40243243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20121611 + 20121612.

It is an arithmetic number, because the mean of its divisors is an integer number (20121612).

Almost surely, 2^40243223 is an apocalyptic number.

40243223 is a deficient number, since it is larger than the sum of its proper divisors (1).

40243223 is an equidigital number, since it uses as much as digits as its factorization.

40243223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 40243223 is about 6343.7546453185. The cubic root of 40243223 is about 342.6869648926.

Adding to 40243223 its reverse (32234204), we get a palindrome (72477427).

The spelling of 40243223 in words is "forty million, two hundred forty-three thousand, two hundred twenty-three".