522540020 has 24 divisors (see below), whose sum is σ = 1104705000. Its totient is φ = 207612032.

The previous prime is 522540019. The next prime is 522540037. The reversal of 522540020 is 20045225.

It can be written as a sum of positive squares in 4 ways, for example, as 93470224 + 429069796 = 9668^2 + 20714^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 522539974 and 522540001.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84695 + ... + 90654.

It is an arithmetic number, because the mean of its divisors is an integer number (46029375).

Almost surely, 2^522540020 is an apocalyptic number.

It is an amenable number.

522540020 is an abundant number, since it is smaller than the sum of its proper divisors (582164980).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

522540020 is a wasteful number, since it uses less digits than its factorization.

522540020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175507 (or 175505 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 522540020 is about 22859.1342793204. The cubic root of 522540020 is about 805.4523491895.

Adding to 522540020 its reverse (20045225), we get a palindrome (542585245).

The spelling of 522540020 in words is "five hundred twenty-two million, five hundred forty thousand, twenty".