442431161 has 2 divisors, whose sum is σ = 442431162. Its totient is φ = 442431160.

The previous prime is 442431149. The next prime is 442431167. The reversal of 442431161 is 161134244.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 229825600 + 212605561 = 15160^2 + 14581^2 .

It is a cyclic number.

It is not a de Polignac number, because 442431161 - 2⁶ = 442431097 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 442431161.

It is not a weakly prime, because it can be changed into another prime (442431167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221215580 + 221215581.

It is an arithmetic number, because the mean of its divisors is an integer number (221215581).

Almost surely, 2^442431161 is an apocalyptic number.

It is an amenable number.

442431161 is a deficient number, since it is larger than the sum of its proper divisors (1).

442431161 is an equidigital number, since it uses as much as digits as its factorization.

442431161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 26.

The square root of 442431161 is about 21034.0476608759. The cubic root of 442431161 is about 761.9887669045.

The spelling of 442431161 in words is "four hundred forty-two million, four hundred thirty-one thousand, one hundred sixty-one".