320121232 has 20 divisors (see below), whose sum is σ = 620858700. Its totient is φ = 159899648.

The previous prime is 320121211. The next prime is 320121247. The reversal of 320121232 is 232121023.

It can be written as a sum of positive squares in 2 ways, for example, as 128686336 + 191434896 = 11344^2 + 13836^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7248 + ... + 26320.

It is an arithmetic number, because the mean of its divisors is an integer number (31042935).

Almost surely, 2^320121232 is an apocalyptic number.

It is an amenable number.

320121232 is a deficient number, since it is larger than the sum of its proper divisors (300737468).

320121232 is a wasteful number, since it uses less digits than its factorization.

320121232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20130 (or 20124 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 320121232 is about 17891.9320365354. The cubic root of 320121232 is about 684.0767443500.

Adding to 320121232 its reverse (232121023), we get a palindrome (552242255).

The spelling of 320121232 in words is "three hundred twenty million, one hundred twenty-one thousand, two hundred thirty-two".