442240273 has 2 divisors, whose sum is σ = 442240274. Its totient is φ = 442240272.

The previous prime is 442240237. The next prime is 442240277. The reversal of 442240273 is 372042244.

Together with previous prime (442240237) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 402082704 + 40157569 = 20052^2 + 6337^2 .

It is a cyclic number.

It is not a de Polignac number, because 442240273 - 2⁹ = 442239761 is a prime.

It is a super-2 number, since 2×442240273² = 391152918126229058, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (442240277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221120136 + 221120137.

It is an arithmetic number, because the mean of its divisors is an integer number (221120137).

Almost surely, 2^442240273 is an apocalyptic number.

It is an amenable number.

442240273 is a deficient number, since it is larger than the sum of its proper divisors (1).

442240273 is an equidigital number, since it uses as much as digits as its factorization.

442240273 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10752, while the sum is 28.

The square root of 442240273 is about 21029.5095758318. The cubic root of 442240273 is about 761.8791638382.

The spelling of 442240273 in words is "four hundred forty-two million, two hundred forty thousand, two hundred seventy-three".