522342021 has 4 divisors (see below), whose sum is σ = 696456032. Its totient is φ = 348228012.

The previous prime is 522342013. The next prime is 522342047. The reversal of 522342021 is 120243225.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 522342021 - 2³ = 522342013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (522342001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87057001 + ... + 87057006.

It is an arithmetic number, because the mean of its divisors is an integer number (174114008).

Almost surely, 2^522342021 is an apocalyptic number.

It is an amenable number.

522342021 is a deficient number, since it is larger than the sum of its proper divisors (174114011).

522342021 is a wasteful number, since it uses less digits than its factorization.

522342021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174114010.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 522342021 is about 22854.8030181842. The cubic root of 522342021 is about 805.3506032939.

Adding to 522342021 its reverse (120243225), we get a palindrome (642585246).

The spelling of 522342021 in words is "five hundred twenty-two million, three hundred forty-two thousand, twenty-one".