321533132 has 12 divisors (see below), whose sum is σ = 566732040. Its totient is φ = 159609696.

The previous prime is 321533117. The next prime is 321533137. The reversal of 321533132 is 231335123.

It is a junction number, because it is equal to n+sod(n) for n = 321533098 and 321533107.

It is not an unprimeable number, because it can be changed into a prime (321533137) 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 3 ways as a sum of consecutive naturals, for example, 288593 + ... + 289704.

It is an arithmetic number, because the mean of its divisors is an integer number (47227670).

Almost surely, 2^321533132 is an apocalyptic number.

It is an amenable number.

321533132 is a deficient number, since it is larger than the sum of its proper divisors (245198908).

321533132 is a wasteful number, since it uses less digits than its factorization.

321533132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578440 (or 578438 counting only the distinct ones).

The product of its digits is 1620, while the sum is 23.

The square root of 321533132 is about 17931.3449579221. The cubic root of 321533132 is about 685.0809800013.

Adding to 321533132 its reverse (231335123), we get a palindrome (552868255).

The spelling of 321533132 in words is "three hundred twenty-one million, five hundred thirty-three thousand, one hundred thirty-two".