31320334421 has 16 divisors (see below), whose sum is σ = 33949968048. Its totient is φ = 28786176000.

The previous prime is 31320334411. The next prime is 31320334429. The reversal of 31320334421 is 12443302313.

It can be written as a sum of positive squares in 8 ways, for example, as 10415223025 + 20905111396 = 102055^2 + 144586^2 .

It is a cyclic number.

It is not a de Polignac number, because 31320334421 - 2¹⁴ = 31320318037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31320334429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 401 + ... + 250281.

It is an arithmetic number, because the mean of its divisors is an integer number (2121873003).

Almost surely, 2^31320334421 is an apocalyptic number.

It is an amenable number.

31320334421 is a deficient number, since it is larger than the sum of its proper divisors (2629633627).

31320334421 is a wasteful number, since it uses less digits than its factorization.

31320334421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250072.

The product of its (nonzero) digits is 5184, while the sum is 26.

Adding to 31320334421 its reverse (12443302313), we get a palindrome (43763636734).

The spelling of 31320334421 in words is "thirty-one billion, three hundred twenty million, three hundred thirty-four thousand, four hundred twenty-one".