321531143131340 has 48 divisors (see below), whose sum is σ = 676048912453152. Its totient is φ = 128453700942336.

The previous prime is 321531143131321. The next prime is 321531143131403. The reversal of 321531143131340 is 43131341135123.

It is a self number, because there is not a number n which added to its sum of digits gives 321531143131340.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 719547824 + ... + 719994536.

It is an arithmetic number, because the mean of its divisors is an integer number (14084352342774).

Almost surely, 2^{321531143131340} is an apocalyptic number.

It is an amenable number.

321531143131340 is an abundant number, since it is smaller than the sum of its proper divisors (354517769321812).

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

321531143131340 is a wasteful number, since it uses less digits than its factorization.

321531143131340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491066 (or 491064 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 35.

Adding to 321531143131340 its reverse (43131341135123), we get a palindrome (364662484266463).

The spelling of 321531143131340 in words is "three hundred twenty-one trillion, five hundred thirty-one billion, one hundred forty-three million, one hundred thirty-one thousand, three hundred forty".