323212540520 has 16 divisors (see below), whose sum is σ = 727228216260. Its totient is φ = 129285016192.

The previous prime is 323212540507. The next prime is 323212540537. The reversal of 323212540520 is 25045212323.

It can be written as a sum of positive squares in 2 ways, for example, as 321758948644 + 1453591876 = 567238^2 + 38126^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4040156717 + ... + 4040156796.

Almost surely, 2^323212540520 is an apocalyptic number.

It is an amenable number.

323212540520 is an abundant number, since it is smaller than the sum of its proper divisors (404015675740).

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

323212540520 is a wasteful number, since it uses less digits than its factorization.

323212540520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8080313524 (or 8080313520 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 29.

Adding to 323212540520 its reverse (25045212323), we get a palindrome (348257752843).

The spelling of 323212540520 in words is "three hundred twenty-three billion, two hundred twelve million, five hundred forty thousand, five hundred twenty".