42340223 has 2 divisors, whose sum is σ = 42340224. Its totient is φ = 42340222.

The previous prime is 42340213. The next prime is 42340241. The reversal of 42340223 is 32204324.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42340223 - 2⁸ = 42339967 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 42340195 and 42340204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42340213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21170111 + 21170112.

It is an arithmetic number, because the mean of its divisors is an integer number (21170112).

Almost surely, 2^42340223 is an apocalyptic number.

42340223 is a deficient number, since it is larger than the sum of its proper divisors (1).

42340223 is an equidigital number, since it uses as much as digits as its factorization.

42340223 is an odious number, because the sum of its binary digits is odd.

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

The square root of 42340223 is about 6506.9365295813. The cubic root of 42340223 is about 348.5387321122.

Adding to 42340223 its reverse (32204324), we get a palindrome (74544547).

The spelling of 42340223 in words is "forty-two million, three hundred forty thousand, two hundred twenty-three".