522232421 has 4 divisors (see below), whose sum is σ = 522359244. Its totient is φ = 522105600.

The previous prime is 522232409. The next prime is 522232427. The reversal of 522232421 is 124232225.

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 482680900 + 39551521 = 21970^2 + 6289^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-522232421 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (522232427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57020 + ... + 65541.

It is an arithmetic number, because the mean of its divisors is an integer number (130589811).

Almost surely, 2^522232421 is an apocalyptic number.

It is an amenable number.

522232421 is a deficient number, since it is larger than the sum of its proper divisors (126823).

522232421 is a wasteful number, since it uses less digits than its factorization.

522232421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126822.

The product of its digits is 1920, while the sum is 23.

The square root of 522232421 is about 22852.4051469424. The cubic root of 522232421 is about 805.2942720035.

Adding to 522232421 its reverse (124232225), we get a palindrome (646464646).

The spelling of 522232421 in words is "five hundred twenty-two million, two hundred thirty-two thousand, four hundred twenty-one".