442040220197 has 2 divisors, whose sum is σ = 442040220198. Its totient is φ = 442040220196.

The previous prime is 442040220179. The next prime is 442040220229. The reversal of 442040220197 is 791022040244.

Together with previous prime (442040220179) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 433983183076 + 8057037121 = 658774^2 + 89761^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442040220197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442040220107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221020110098 + 221020110099.

It is an arithmetic number, because the mean of its divisors is an integer number (221020110099).

Almost surely, 2^442040220197 is an apocalyptic number.

It is an amenable number.

442040220197 is a deficient number, since it is larger than the sum of its proper divisors (1).

442040220197 is an equidigital number, since it uses as much as digits as its factorization.

442040220197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 35.

The spelling of 442040220197 in words is "four hundred forty-two billion, forty million, two hundred twenty thousand, one hundred ninety-seven".