321247332 has 108 divisors (see below), whose sum is σ = 949532220. Its totient is φ = 91308672.

The previous prime is 321247331. The next prime is 321247337. The reversal of 321247332 is 233742123.

321247332 is a `hidden beast` number, since 321 + 2 + 4 + 7 + 332 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 189778176 + 131469156 = 13776^2 + 11466^2 .

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 321247296 and 321247305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321247331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 474178 + ... + 474854.

It is an arithmetic number, because the mean of its divisors is an integer number (8791965).

Almost surely, 2^321247332 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 321247332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (474766110).

321247332 is an abundant number, since it is smaller than the sum of its proper divisors (628284888).

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

321247332 is a wasteful number, since it uses less digits than its factorization.

321247332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 970 (or 958 counting only the distinct ones).

The product of its digits is 6048, while the sum is 27.

The square root of 321247332 is about 17923.3739011381. The cubic root of 321247332 is about 684.8779380071.

Adding to 321247332 its reverse (233742123), we get a palindrome (554989455).

The spelling of 321247332 in words is "three hundred twenty-one million, two hundred forty-seven thousand, three hundred thirty-two".