31320223222331 has 2 divisors, whose sum is σ = 31320223222332. Its totient is φ = 31320223222330.

The previous prime is 31320223222231. The next prime is 31320223222339. The reversal of 31320223222331 is 13322232202313.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31320223222331 is a prime.

It is a super-2 number, since 2×31320223222331² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31320223222294 and 31320223222303.

It is not a weakly prime, because it can be changed into another prime (31320223222339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15660111611165 + 15660111611166.

It is an arithmetic number, because the mean of its divisors is an integer number (15660111611166).

Almost surely, 2^{31320223222331} is an apocalyptic number.

31320223222331 is a deficient number, since it is larger than the sum of its proper divisors (1).

31320223222331 is an equidigital number, since it uses as much as digits as its factorization.

31320223222331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 29.

Adding to 31320223222331 its reverse (13322232202313), we get a palindrome (44642455424644).

The spelling of 31320223222331 in words is "thirty-one trillion, three hundred twenty billion, two hundred twenty-three million, two hundred twenty-two thousand, three hundred thirty-one".