521044224524021 has 24 divisors (see below), whose sum is σ = 577247929574400. Its totient is φ = 469930298302080.

The previous prime is 521044224523973. The next prime is 521044224524027. The reversal of 521044224524021 is 120425422440125.

It is not a de Polignac number, because 521044224524021 - 2¹⁴ = 521044224507637 is a prime.

It is a super-3 number, since 3×521044224524021³ (a number of 45 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521044224524027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 447166430 + ... + 448330128.

It is an arithmetic number, because the mean of its divisors is an integer number (24051997065600).

Almost surely, 2^{521044224524021} is an apocalyptic number.

It is an amenable number.

521044224524021 is a deficient number, since it is larger than the sum of its proper divisors (56203705050379).

521044224524021 is a wasteful number, since it uses less digits than its factorization.

521044224524021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1192985 (or 1192974 counting only the distinct ones).

The product of its (nonzero) digits is 204800, while the sum is 38.

Adding to 521044224524021 its reverse (120425422440125), we get a palindrome (641469646964146).

The spelling of 521044224524021 in words is "five hundred twenty-one trillion, forty-four billion, two hundred twenty-four million, five hundred twenty-four thousand, twenty-one".