31322310331331 has 4 divisors (see below), whose sum is σ = 31460294077512. Its totient is φ = 31184326585152.

The previous prime is 31322310331309. The next prime is 31322310331349. The reversal of 31322310331331 is 13313301322313.

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 31322310331331 - 2⁶ = 31322310331267 is a prime.

It is a super-2 number, since 2×31322310331331² (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 = 31322310331294 and 31322310331303.

It is not an unprimeable number, because it can be changed into a prime (31322310631331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68991872750 + ... + 68991873203.

It is an arithmetic number, because the mean of its divisors is an integer number (7865073519378).

Almost surely, 2^{31322310331331} is an apocalyptic number.

31322310331331 is a deficient number, since it is larger than the sum of its proper divisors (137983746181).

31322310331331 is a wasteful number, since it uses less digits than its factorization.

31322310331331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137983746180.

The product of its (nonzero) digits is 8748, while the sum is 29.

Adding to 31322310331331 its reverse (13313301322313), we get a palindrome (44635611653644).

The spelling of 31322310331331 in words is "thirty-one trillion, three hundred twenty-two billion, three hundred ten million, three hundred thirty-one thousand, three hundred thirty-one".