531032421321 has 12 divisors (see below), whose sum is σ = 767312558272. Its totient is φ = 353898970776.

The previous prime is 531032421307. The next prime is 531032421329. The reversal of 531032421321 is 123124230135.

531032421321 is a `hidden beast` number, since 5 + 3 + 10 + 324 + 2 + 1 + 321 = 666.

It is not a de Polignac number, because 531032421321 - 2²¹ = 531030324169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (531032421329) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10192861 + ... + 10244826.

Almost surely, 2^531032421321 is an apocalyptic number.

It is an amenable number.

531032421321 is a deficient number, since it is larger than the sum of its proper divisors (236280136951).

531032421321 is a wasteful number, since it uses less digits than its factorization.

531032421321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20440580 (or 20440577 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

Adding to 531032421321 its reverse (123124230135), we get a palindrome (654156651456).

The spelling of 531032421321 in words is "five hundred thirty-one billion, thirty-two million, four hundred twenty-one thousand, three hundred twenty-one".