442243541 has 2 divisors, whose sum is σ = 442243542. Its totient is φ = 442243540.

The previous prime is 442243531. The next prime is 442243547. The reversal of 442243541 is 145342244.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 225300100 + 216943441 = 15010^2 + 14729^2 .

It is a cyclic number.

It is not a de Polignac number, because 442243541 - 2¹⁴ = 442227157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442243547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221121770 + 221121771.

It is an arithmetic number, because the mean of its divisors is an integer number (221121771).

Almost surely, 2^442243541 is an apocalyptic number.

It is an amenable number.

442243541 is a deficient number, since it is larger than the sum of its proper divisors (1).

442243541 is an equidigital number, since it uses as much as digits as its factorization.

442243541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15360, while the sum is 29.

The square root of 442243541 is about 21029.5872760261. The cubic root of 442243541 is about 761.8810405066.

Adding to 442243541 its reverse (145342244), we get a palindrome (587585785).

The spelling of 442243541 in words is "four hundred forty-two million, two hundred forty-three thousand, five hundred forty-one".