323213520520 has 48 divisors (see below), whose sum is σ = 799352458380. Its totient is φ = 117532187520.

The previous prime is 323213520491. The next prime is 323213520521. The reversal of 323213520520 is 25025312323.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 320847476356 + 2366044164 = 566434^2 + 48642^2 .

It is a super-2 number, since 2×323213520520² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (323213520521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33384987 + ... + 33394666.

Almost surely, 2^323213520520 is an apocalyptic number.

It is an amenable number.

323213520520 is an abundant number, since it is smaller than the sum of its proper divisors (476138937860).

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

323213520520 is a wasteful number, since it uses less digits than its factorization.

323213520520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66779686 (or 66779671 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 28.

Adding to 323213520520 its reverse (25025312323), we get a palindrome (348238832843).

The spelling of 323213520520 in words is "three hundred twenty-three billion, two hundred thirteen million, five hundred twenty thousand, five hundred twenty".