524144521 has 4 divisors (see below), whose sum is σ = 542218500. Its totient is φ = 506070544.

The previous prime is 524144503. The next prime is 524144549. The reversal of 524144521 is 125441425.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 442513296 + 81631225 = 21036^2 + 9035^2 .

It is a cyclic number.

It is not a de Polignac number, because 524144521 - 2¹¹ = 524142473 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 524144521.

It is not an unprimeable number, because it can be changed into a prime (524144581) 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 3 ways as a sum of consecutive naturals, for example, 9036946 + ... + 9037003.

It is an arithmetic number, because the mean of its divisors is an integer number (135554625).

Almost surely, 2^524144521 is an apocalyptic number.

It is an amenable number.

524144521 is a deficient number, since it is larger than the sum of its proper divisors (18073979).

524144521 is a wasteful number, since it uses less digits than its factorization.

524144521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18073978.

The product of its digits is 6400, while the sum is 28.

The square root of 524144521 is about 22894.2027814903. The cubic root of 524144521 is about 806.2759088203.

Adding to 524144521 its reverse (125441425), we get a palindrome (649585946).

The spelling of 524144521 in words is "five hundred twenty-four million, one hundred forty-four thousand, five hundred twenty-one".