42243413 has 2 divisors, whose sum is σ = 42243414. Its totient is φ = 42243412.

The previous prime is 42243389. The next prime is 42243497. The reversal of 42243413 is 31434224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41692849 + 550564 = 6457^2 + 742^2 .

It is a cyclic number.

It is not a de Polignac number, because 42243413 - 2⁶ = 42243349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42243013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21121706 + 21121707.

It is an arithmetic number, because the mean of its divisors is an integer number (21121707).

Almost surely, 2^42243413 is an apocalyptic number.

It is an amenable number.

42243413 is a deficient number, since it is larger than the sum of its proper divisors (1).

42243413 is an equidigital number, since it uses as much as digits as its factorization.

42243413 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 23.

The square root of 42243413 is about 6499.4932879418. The cubic root of 42243413 is about 348.2728873134.

Adding to 42243413 its reverse (31434224), we get a palindrome (73677637).

The spelling of 42243413 in words is "forty-two million, two hundred forty-three thousand, four hundred thirteen".