442111217 has 2 divisors, whose sum is σ = 442111218. Its totient is φ = 442111216.

The previous prime is 442111199. The next prime is 442111253. The reversal of 442111217 is 712111244.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 409495696 + 32615521 = 20236^2 + 5711^2 .

It is a cyclic number.

It is not a de Polignac number, because 442111217 - 2¹⁸ = 441849073 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 442111192 and 442111201.

It is not a weakly prime, because it can be changed into another prime (442111277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221055608 + 221055609.

It is an arithmetic number, because the mean of its divisors is an integer number (221055609).

Almost surely, 2^442111217 is an apocalyptic number.

It is an amenable number.

442111217 is a deficient number, since it is larger than the sum of its proper divisors (1).

442111217 is an equidigital number, since it uses as much as digits as its factorization.

442111217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 448, while the sum is 23.

The square root of 442111217 is about 21026.4409018740. The cubic root of 442111217 is about 761.8050452731.

The spelling of 442111217 in words is "four hundred forty-two million, one hundred eleven thousand, two hundred seventeen".