42445223 has 2 divisors, whose sum is σ = 42445224. Its totient is φ = 42445222.

The previous prime is 42445217. The next prime is 42445279. The reversal of 42445223 is 32254424.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42445223 - 2⁸ = 42444967 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42445192 and 42445201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42445523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21222611 + 21222612.

It is an arithmetic number, because the mean of its divisors is an integer number (21222612).

Almost surely, 2^42445223 is an apocalyptic number.

42445223 is a deficient number, since it is larger than the sum of its proper divisors (1).

42445223 is an equidigital number, since it uses as much as digits as its factorization.

42445223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7680, while the sum is 26.

The square root of 42445223 is about 6514.9998465081. Note that the first 3 decimals coincide. The cubic root of 42445223 is about 348.8266093269.

Adding to 42445223 its reverse (32254424), we get a palindrome (74699647).

The spelling of 42445223 in words is "forty-two million, four hundred forty-five thousand, two hundred twenty-three".