320211332 has 72 divisors (see below), whose sum is σ = 686165760. Its totient is φ = 128044800.

The previous prime is 320211251. The next prime is 320211341. The reversal of 320211332 is 233112023.

It is a self number, because there is not a number n which added to its sum of digits gives 320211332.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 798332 + ... + 798732.

It is an arithmetic number, because the mean of its divisors is an integer number (9530080).

Almost surely, 2^320211332 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 320211332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (343082880).

320211332 is an abundant number, since it is smaller than the sum of its proper divisors (365954428).

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

320211332 is a wasteful number, since it uses less digits than its factorization.

320211332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529 (or 508 counting only the distinct ones).

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

The square root of 320211332 is about 17894.4497540438. The cubic root of 320211332 is about 684.1409174683.

Adding to 320211332 its reverse (233112023), we get a palindrome (553323355).

The spelling of 320211332 in words is "three hundred twenty million, two hundred eleven thousand, three hundred thirty-two".