31320230131 has 2 divisors, whose sum is σ = 31320230132. Its totient is φ = 31320230130.

The previous prime is 31320230089. The next prime is 31320230141. The reversal of 31320230131 is 13103202313.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31320230131 - 2⁷ = 31320230003 is a prime.

It is a super-2 number, since 2×31320230131² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31320230099 and 31320230108.

It is not a weakly prime, because it can be changed into another prime (31320230141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15660115065 + 15660115066.

It is an arithmetic number, because the mean of its divisors is an integer number (15660115066).

Almost surely, 2^31320230131 is an apocalyptic number.

31320230131 is a deficient number, since it is larger than the sum of its proper divisors (1).

31320230131 is an equidigital number, since it uses as much as digits as its factorization.

31320230131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 31320230131 its reverse (13103202313), we get a palindrome (44423432444).

The spelling of 31320230131 in words is "thirty-one billion, three hundred twenty million, two hundred thirty thousand, one hundred thirty-one".