442403253 has 12 divisors (see below), whose sum is σ = 639215148. Its totient is φ = 294848640.

The previous prime is 442403237. The next prime is 442403267. The reversal of 442403253 is 352304244.

442403253 is a `hidden beast` number, since 4 + 4 + 2 + 403 + 253 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 374538609 + 67864644 = 19353^2 + 8238^2 .

It is not a de Polignac number, because 442403253 - 2⁴ = 442403237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442402253) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44413 + ... + 53453.

It is an arithmetic number, because the mean of its divisors is an integer number (53267929).

Almost surely, 2^442403253 is an apocalyptic number.

It is an amenable number.

442403253 is a deficient number, since it is larger than the sum of its proper divisors (196811895).

442403253 is a wasteful number, since it uses less digits than its factorization.

442403253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14484 (or 14481 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 27.

The square root of 442403253 is about 21033.3842498063. The cubic root of 442403253 is about 761.9727448040.

Adding to 442403253 its reverse (352304244), we get a palindrome (794707497).

Subtracting from 442403253 its reverse (352304244), we obtain a palindrome (90099009).

The spelling of 442403253 in words is "four hundred forty-two million, four hundred three thousand, two hundred fifty-three".