1323031220 has 48 divisors (see below), whose sum is σ = 3177740160. Its totient is φ = 453258624.

The previous prime is 1323031211. The next prime is 1323031271. The reversal of 1323031220 is 221303231.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 230546 + ... + 236214.

It is an arithmetic number, because the mean of its divisors is an integer number (66202920).

Almost surely, 2^1323031220 is an apocalyptic number.

1323031220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1323031220 is an abundant number, since it is smaller than the sum of its proper divisors (1854708940).

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

1323031220 is a wasteful number, since it uses less digits than its factorization.

1323031220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7352 (or 7350 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 1323031220 is about 36373.4961201147. The cubic root of 1323031220 is about 1097.8003481260.

Adding to 1323031220 its reverse (221303231), we get a palindrome (1544334451).

The spelling of 1323031220 in words is "one billion, three hundred twenty-three million, thirty-one thousand, two hundred twenty".