522521421 has 8 divisors (see below), whose sum is σ = 700232544. Its totient is φ = 346578960.

The previous prime is 522521411. The next prime is 522521459. The reversal of 522521421 is 124125225.

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

It is not a de Polignac number, because 522521421 - 2⁹ = 522520909 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 522521391 and 522521400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (522521411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 441475 + ... + 442656.

It is an arithmetic number, because the mean of its divisors is an integer number (87529068).

Almost surely, 2^522521421 is an apocalyptic number.

It is an amenable number.

522521421 is a deficient number, since it is larger than the sum of its proper divisors (177711123).

522521421 is a wasteful number, since it uses less digits than its factorization.

522521421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 884331.

The product of its digits is 1600, while the sum is 24.

The square root of 522521421 is about 22858.7274580192. The cubic root of 522521421 is about 805.4427928012.

Adding to 522521421 its reverse (124125225), we get a palindrome (646646646).

The spelling of 522521421 in words is "five hundred twenty-two million, five hundred twenty-one thousand, four hundred twenty-one".