42445313 has 2 divisors, whose sum is σ = 42445314. Its totient is φ = 42445312.

The previous prime is 42445303. The next prime is 42445321. The reversal of 42445313 is 31354424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26708224 + 15737089 = 5168^2 + 3967^2 .

It is a cyclic number.

It is not a de Polignac number, because 42445313 - 2⁸ = 42445057 is a prime.

It is not a weakly prime, because it can be changed into another prime (42445303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21222656 + 21222657.

It is an arithmetic number, because the mean of its divisors is an integer number (21222657).

Almost surely, 2^42445313 is an apocalyptic number.

It is an amenable number.

42445313 is a deficient number, since it is larger than the sum of its proper divisors (1).

42445313 is an equidigital number, since it uses as much as digits as its factorization.

42445313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 26.

The square root of 42445313 is about 6515.0067536419. The cubic root of 42445313 is about 348.8268558750.

Adding to 42445313 its reverse (31354424), we get a palindrome (73799737).

The spelling of 42445313 in words is "forty-two million, four hundred forty-five thousand, three hundred thirteen".