512104222520521 has 8 divisors (see below), whose sum is σ = 520519633714184. Its totient is φ = 503689464875520.

The previous prime is 512104222520459. The next prime is 512104222520543. The reversal of 512104222520521 is 125025222401215.

It can be written as a sum of positive squares in 4 ways, for example, as 7730735376400 + 504373487144121 = 2780420^2 + 22458261^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 512104222520521 - 2¹³ = 512104222512329 is a prime.

It is a super-2 number, since 2×512104222520521² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (512104222520551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161807016 + ... + 164941561.

It is an arithmetic number, because the mean of its divisors is an integer number (65064954214273).

Almost surely, 2^{512104222520521} is an apocalyptic number.

It is an amenable number.

512104222520521 is a deficient number, since it is larger than the sum of its proper divisors (8415411193663).

512104222520521 is a wasteful number, since it uses less digits than its factorization.

512104222520521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326774331.

The product of its (nonzero) digits is 32000, while the sum is 34.

Adding to 512104222520521 its reverse (125025222401215), we get a palindrome (637129444921736).

The spelling of 512104222520521 in words is "five hundred twelve trillion, one hundred four billion, two hundred twenty-two million, five hundred twenty thousand, five hundred twenty-one".