442746531521 has 16 divisors (see below), whose sum is σ = 514577505408. Its totient is φ = 373067856000.

The previous prime is 442746531517. The next prime is 442746531527. The reversal of 442746531521 is 125135647244.

It is not a de Polignac number, because 442746531521 - 2² = 442746531517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442746531527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 481166 + ... + 1056888.

It is an arithmetic number, because the mean of its divisors is an integer number (32161094088).

Almost surely, 2^442746531521 is an apocalyptic number.

It is an amenable number.

442746531521 is a deficient number, since it is larger than the sum of its proper divisors (71830973887).

442746531521 is a wasteful number, since it uses less digits than its factorization.

442746531521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577592.

The product of its digits is 806400, while the sum is 44.

The spelling of 442746531521 in words is "four hundred forty-two billion, seven hundred forty-six million, five hundred thirty-one thousand, five hundred twenty-one".