320215312240 has 80 divisors (see below), whose sum is σ = 778666287168. Its totient is φ = 122233909248.

The previous prime is 320215312237. The next prime is 320215312243. The reversal of 320215312240 is 42213512023.

It is an interprime number because it is at equal distance from previous prime (320215312237) and next prime (320215312243).

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320215312243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 595762 + ... + 997678.

Almost surely, 2^320215312240 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 320215312240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (389333143584).

320215312240 is an abundant number, since it is smaller than the sum of its proper divisors (458450974928).

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

320215312240 is a wasteful number, since it uses less digits than its factorization.

320215312240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402386 (or 402380 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 320215312240 its reverse (42213512023), we get a palindrome (362428824263).

The spelling of 320215312240 in words is "three hundred twenty billion, two hundred fifteen million, three hundred twelve thousand, two hundred forty".