442221113 has 2 divisors, whose sum is σ = 442221114. Its totient is φ = 442221112.

The previous prime is 442221061. The next prime is 442221137. The reversal of 442221113 is 311122244.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 437520889 + 4700224 = 20917^2 + 2168^2 .

It is a cyclic number.

It is not a de Polignac number, because 442221113 - 2¹⁶ = 442155577 is a prime.

It is not a weakly prime, because it can be changed into another prime (442221193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221110556 + 221110557.

It is an arithmetic number, because the mean of its divisors is an integer number (221110557).

Almost surely, 2^442221113 is an apocalyptic number.

It is an amenable number.

442221113 is a deficient number, since it is larger than the sum of its proper divisors (1).

442221113 is an equidigital number, since it uses as much as digits as its factorization.

442221113 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 384, while the sum is 20.

The square root of 442221113 is about 21029.0540205688. The cubic root of 442221113 is about 761.8681609087.

Adding to 442221113 its reverse (311122244), we get a palindrome (753343357).

The spelling of 442221113 in words is "four hundred forty-two million, two hundred twenty-one thousand, one hundred thirteen".