531522820 has 24 divisors (see below), whose sum is σ = 1118225304. Its totient is φ = 212222976.

The previous prime is 531522791. The next prime is 531522839. The reversal of 531522820 is 28225135.

It can be written as a sum of positive squares in 4 ways, for example, as 12503296 + 519019524 = 3536^2 + 22782^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12717 + ... + 34996.

It is an arithmetic number, because the mean of its divisors is an integer number (46592721).

Almost surely, 2^531522820 is an apocalyptic number.

It is an amenable number.

531522820 is an abundant number, since it is smaller than the sum of its proper divisors (586702484).

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

531522820 is a wasteful number, since it uses less digits than its factorization.

531522820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48279 (or 48277 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 531522820 is about 23054.7786803517. The cubic root of 531522820 is about 810.0415667334.

Adding to 531522820 its reverse (28225135), we get a palindrome (559747955).

The spelling of 531522820 in words is "five hundred thirty-one million, five hundred twenty-two thousand, eight hundred twenty".