521144424531 has 16 divisors (see below), whose sum is σ = 783589187200. Its totient is φ = 342244098504.

The previous prime is 521144424503. The next prime is 521144424569. The reversal of 521144424531 is 135424441125.

521144424531 is a `hidden beast` number, since 5 + 2 + 114 + 4 + 4 + 2 + 4 + 531 = 666.

It is not a de Polignac number, because 521144424531 - 2⁶ = 521144424467 is a prime.

It is a super-2 number, since 2×521144424531² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (521144444531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 144040321 + ... + 144043938.

It is an arithmetic number, because the mean of its divisors is an integer number (48974324200).

Almost surely, 2^521144424531 is an apocalyptic number.

521144424531 is a deficient number, since it is larger than the sum of its proper divisors (262444762669).

521144424531 is a wasteful number, since it uses less digits than its factorization.

521144424531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288084335 (or 288084329 counting only the distinct ones).

The product of its digits is 76800, while the sum is 36.

Adding to 521144424531 its reverse (135424441125), we get a palindrome (656568865656).

The spelling of 521144424531 in words is "five hundred twenty-one billion, one hundred forty-four million, four hundred twenty-four thousand, five hundred thirty-one".