442455031221 has 8 divisors (see below), whose sum is σ = 674217190464. Its totient is φ = 252831446400.

The previous prime is 442455031201. The next prime is 442455031223. The reversal of 442455031221 is 122130554244.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 442455031221 - 2⁹ = 442455030709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442455031223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10534643580 + ... + 10534643621.

It is an arithmetic number, because the mean of its divisors is an integer number (84277148808).

Almost surely, 2^442455031221 is an apocalyptic number.

It is an amenable number.

442455031221 is a deficient number, since it is larger than the sum of its proper divisors (231762159243).

442455031221 is a wasteful number, since it uses less digits than its factorization.

442455031221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21069287211.

The product of its (nonzero) digits is 38400, while the sum is 33.

Adding to 442455031221 its reverse (122130554244), we get a palindrome (564585585465).

The spelling of 442455031221 in words is "four hundred forty-two billion, four hundred fifty-five million, thirty-one thousand, two hundred twenty-one".