321142321531 has 8 divisors (see below), whose sum is σ = 338261414400. Its totient is φ = 304044915240.

The previous prime is 321142321517. The next prime is 321142321541. The reversal of 321142321531 is 135123241123.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 321142321531 - 2¹¹ = 321142319483 is a prime.

It is a super-2 number, since 2×321142321531² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 321142321531.

It is not an unprimeable number, because it can be changed into a prime (321142321541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5391235 + ... + 5450476.

It is an arithmetic number, because the mean of its divisors is an integer number (42282676800).

Almost surely, 2^321142321531 is an apocalyptic number.

321142321531 is a deficient number, since it is larger than the sum of its proper divisors (17119092869).

321142321531 is a wasteful number, since it uses less digits than its factorization.

321142321531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10843289.

The product of its digits is 4320, while the sum is 28.

Adding to 321142321531 its reverse (135123241123), we get a palindrome (456265562654).

The spelling of 321142321531 in words is "three hundred twenty-one billion, one hundred forty-two million, three hundred twenty-one thousand, five hundred thirty-one".