442140553 has 4 divisors (see below), whose sum is σ = 442309248. Its totient is φ = 441971860.

The previous prime is 442140541. The next prime is 442140563. The reversal of 442140553 is 355041244.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442140553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442140563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80353 + ... + 85678.

It is an arithmetic number, because the mean of its divisors is an integer number (110577312).

Almost surely, 2^442140553 is an apocalyptic number.

It is an amenable number.

442140553 is a deficient number, since it is larger than the sum of its proper divisors (168695).

442140553 is a wasteful number, since it uses less digits than its factorization.

442140553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168694.

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 442140553 is about 21027.1384881538. The cubic root of 442140553 is about 761.8218945919.

Adding to 442140553 its reverse (355041244), we get a palindrome (797181797).

The spelling of 442140553 in words is "four hundred forty-two million, one hundred forty thousand, five hundred fifty-three".