31232212231331 has 4 divisors (see below), whose sum is σ = 31233583953000. Its totient is φ = 31230840509664.

The previous prime is 31232212231289. The next prime is 31232212231369. The reversal of 31232212231331 is 13313221223213.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31232212231331 - 2²² = 31232208037027 is a prime.

It is a super-2 number, since 2×31232212231331² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31232212231294 and 31232212231303.

It is not an unprimeable number, because it can be changed into a prime (31232212231391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 685826681 + ... + 685872218.

It is an arithmetic number, because the mean of its divisors is an integer number (7808395988250).

Almost surely, 2^{31232212231331} is an apocalyptic number.

31232212231331 is a deficient number, since it is larger than the sum of its proper divisors (1371721669).

31232212231331 is a wasteful number, since it uses less digits than its factorization.

31232212231331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1371721668.

The product of its digits is 7776, while the sum is 29.

Adding to 31232212231331 its reverse (13313221223213), we get a palindrome (44545433454544).

The spelling of 31232212231331 in words is "thirty-one trillion, two hundred thirty-two billion, two hundred twelve million, two hundred thirty-one thousand, three hundred thirty-one".