522843820 has 24 divisors (see below), whose sum is σ = 1145710944. Its totient is φ = 200044416.

The previous prime is 522843779. The next prime is 522843821. The reversal of 522843820 is 28348225.

It is a happy number.

It is a super-2 number, since 2×522843820² = 546731320224384800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (522843821) 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, 567849 + ... + 568768.

It is an arithmetic number, because the mean of its divisors is an integer number (47737956).

Almost surely, 2^522843820 is an apocalyptic number.

It is an amenable number.

522843820 is an abundant number, since it is smaller than the sum of its proper divisors (622867124).

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

522843820 is a wasteful number, since it uses less digits than its factorization.

522843820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1136649 (or 1136647 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 34.

The square root of 522843820 is about 22865.7783598110. The cubic root of 522843820 is about 805.6084131644.

The spelling of 522843820 in words is "five hundred twenty-two million, eight hundred forty-three thousand, eight hundred twenty".