320021130 has 64 divisors (see below), whose sum is σ = 902337408. Its totient is φ = 71612160.

The previous prime is 320021101. The next prime is 320021131. The reversal of 320021130 is 31120023.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (320021131) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 33009 + ... + 41588.

It is an arithmetic number, because the mean of its divisors is an integer number (14099022).

Almost surely, 2^320021130 is an apocalyptic number.

320021130 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

320021130 is an abundant number, since it is smaller than the sum of its proper divisors (582316278).

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

320021130 is a wasteful number, since it uses less digits than its factorization.

320021130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74631.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 320021130 is about 17889.1344117037. The cubic root of 320021130 is about 684.0054332526.

Adding to 320021130 its reverse (31120023), we get a palindrome (351141153).

The spelling of 320021130 in words is "three hundred twenty million, twenty-one thousand, one hundred thirty".