442052161 has 2 divisors, whose sum is σ = 442052162. Its totient is φ = 442052160.

The previous prime is 442052147. The next prime is 442052167. The reversal of 442052161 is 161250244.

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., 397763136 + 44289025 = 19944^2 + 6655^2 .

It is a cyclic number.

It is not a de Polignac number, because 442052161 - 2¹⁹ = 441527873 is a prime.

It is a super-2 number, since 2×442052161² = 390820226089539842, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (442052167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221026080 + 221026081.

It is an arithmetic number, because the mean of its divisors is an integer number (221026081).

Almost surely, 2^442052161 is an apocalyptic number.

It is an amenable number.

442052161 is a deficient number, since it is larger than the sum of its proper divisors (1).

442052161 is an equidigital number, since it uses as much as digits as its factorization.

442052161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 442052161 is about 21025.0365279112. The cubic root of 442052161 is about 761.7711238220.

The spelling of 442052161 in words is "four hundred forty-two million, fifty-two thousand, one hundred sixty-one".