521144330413 has 16 divisors (see below), whose sum is σ = 609502368640. Its totient is φ = 436265476416.

The previous prime is 521144330401. The next prime is 521144330431. The reversal of 521144330413 is 314033441125.

It is not a de Polignac number, because 521144330413 - 2¹³ = 521144322221 is a prime.

It is a super-2 number, since 2×521144330413² (a number of 24 digits) contains 22 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 (521144330813) 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 15 ways as a sum of consecutive naturals, for example, 3329923 + ... + 3482911.

It is an arithmetic number, because the mean of its divisors is an integer number (38093898040).

Almost surely, 2^521144330413 is an apocalyptic number.

It is an amenable number.

521144330413 is a deficient number, since it is larger than the sum of its proper divisors (88358038227).

521144330413 is a wasteful number, since it uses less digits than its factorization.

521144330413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164356.

The product of its (nonzero) digits is 17280, while the sum is 31.

Adding to 521144330413 its reverse (314033441125), we get a palindrome (835177771538).

The spelling of 521144330413 in words is "five hundred twenty-one billion, one hundred forty-four million, three hundred thirty thousand, four hundred thirteen".