442505263 has 2 divisors, whose sum is σ = 442505264. Its totient is φ = 442505262.

The previous prime is 442505243. The next prime is 442505267. The reversal of 442505263 is 362505244.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442505263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442505267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221252631 + 221252632.

It is an arithmetic number, because the mean of its divisors is an integer number (221252632).

Almost surely, 2^442505263 is an apocalyptic number.

442505263 is a deficient number, since it is larger than the sum of its proper divisors (1).

442505263 is an equidigital number, since it uses as much as digits as its factorization.

442505263 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28800, while the sum is 31.

The square root of 442505263 is about 21035.8090645452. The cubic root of 442505263 is about 762.0313059061.

The spelling of 442505263 in words is "four hundred forty-two million, five hundred five thousand, two hundred sixty-three".