323031211220 has 24 divisors (see below), whose sum is σ = 678542684904. Its totient is φ = 129178743296.

The previous prime is 323031211213. The next prime is 323031211229. The reversal of 323031211220 is 22112130323.

It can be written as a sum of positive squares in 4 ways, for example, as 14875217296 + 308155993924 = 121964^2 + 555118^2 .

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 = 323031211192 and 323031211201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (323031211229) 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, 2030249 + ... + 2183568.

It is an arithmetic number, because the mean of its divisors is an integer number (28272611871).

Almost surely, 2^323031211220 is an apocalyptic number.

It is an amenable number.

323031211220 is an abundant number, since it is smaller than the sum of its proper divisors (355511473684).

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

323031211220 is a wasteful number, since it uses less digits than its factorization.

323031211220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4217659 (or 4217657 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 323031211220 its reverse (22112130323), we get a palindrome (345143341543).

The spelling of 323031211220 in words is "three hundred twenty-three billion, thirty-one million, two hundred eleven thousand, two hundred twenty".