320231212240 has 20 divisors (see below), whose sum is σ = 744537568644. Its totient is φ = 128092484864.

The previous prime is 320231212219. The next prime is 320231212243. The reversal of 320231212240 is 42212132023.

It can be written as a sum of positive squares in 2 ways, for example, as 204383559744 + 115847652496 = 452088^2 + 340364^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320231212243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2001444997 + ... + 2001445156.

Almost surely, 2^320231212240 is an apocalyptic number.

It is an amenable number.

320231212240 is an abundant number, since it is smaller than the sum of its proper divisors (424306356404).

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

320231212240 is a wasteful number, since it uses less digits than its factorization.

320231212240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4002890166 (or 4002890160 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 320231212240 its reverse (42212132023), we get a palindrome (362443344263).

The spelling of 320231212240 in words is "three hundred twenty billion, two hundred thirty-one million, two hundred twelve thousand, two hundred forty".