522002221 has 8 divisors (see below), whose sum is σ = 595224504. Its totient is φ = 453504000.

The previous prime is 522002207. The next prime is 522002237. The reversal of 522002221 is 122200225.

It can be written as a sum of positive squares in 4 ways, for example, as 210656196 + 311346025 = 14514^2 + 17645^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 522002221 - 2¹³ = 521994029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 522002195 and 522002204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (522002251) 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, 1180780 + ... + 1181221.

It is an arithmetic number, because the mean of its divisors is an integer number (74403063).

Almost surely, 2^522002221 is an apocalyptic number.

It is an amenable number.

522002221 is a deficient number, since it is larger than the sum of its proper divisors (73222283).

522002221 is a wasteful number, since it uses less digits than its factorization.

522002221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2362031.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 522002221 is about 22847.3679228046. The cubic root of 522002221 is about 805.1759300680.

Adding to 522002221 its reverse (122200225), we get a palindrome (644202446).

The spelling of 522002221 in words is "five hundred twenty-two million, two thousand, two hundred twenty-one".