31440231423321 has 16 divisors (see below), whose sum is σ = 49560955939200. Its totient is φ = 17346334578048.

The previous prime is 31440231423317. The next prime is 31440231423347. The reversal of 31440231423321 is 12332413204413.

It is not a de Polignac number, because 31440231423321 - 2² = 31440231423317 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31440231423361) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25812997276 + ... + 25812998493.

It is an arithmetic number, because the mean of its divisors is an integer number (3097559746200).

Almost surely, 2^{31440231423321} is an apocalyptic number.

It is an amenable number.

31440231423321 is a deficient number, since it is larger than the sum of its proper divisors (18120724515879).

31440231423321 is a wasteful number, since it uses less digits than its factorization.

31440231423321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51625995808.

The product of its (nonzero) digits is 41472, while the sum is 33.

Adding to 31440231423321 its reverse (12332413204413), we get a palindrome (43772644627734).

The spelling of 31440231423321 in words is "thirty-one trillion, four hundred forty billion, two hundred thirty-one million, four hundred twenty-three thousand, three hundred twenty-one".