442153021 has 4 divisors (see below), whose sum is σ = 449647200. Its totient is φ = 434658844.

The previous prime is 442153013. The next prime is 442153079. The reversal of 442153021 is 120351244.

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 not a de Polignac number, because 442153021 - 2³ = 442153013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 442152983 and 442153001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442153001) 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, 3747001 + ... + 3747118.

It is an arithmetic number, because the mean of its divisors is an integer number (112411800).

Almost surely, 2^442153021 is an apocalyptic number.

It is an amenable number.

442153021 is a deficient number, since it is larger than the sum of its proper divisors (7494179).

442153021 is an equidigital number, since it uses as much as digits as its factorization.

442153021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7494178.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 442153021 is about 21027.4349600706. The cubic root of 442153021 is about 761.8290554415.

The spelling of 442153021 in words is "four hundred forty-two million, one hundred fifty-three thousand, twenty-one".