31225425131 has 2 divisors, whose sum is σ = 31225425132. Its totient is φ = 31225425130.

The previous prime is 31225425083. The next prime is 31225425169. The reversal of 31225425131 is 13152452213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31225425131 - 2³⁰ = 30151683307 is a prime.

It is a super-2 number, since 2×31225425131² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 31225425094 and 31225425103.

It is not a weakly prime, because it can be changed into another prime (31225425431) 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, 15612712565 + 15612712566.

It is an arithmetic number, because the mean of its divisors is an integer number (15612712566).

Almost surely, 2^31225425131 is an apocalyptic number.

31225425131 is a deficient number, since it is larger than the sum of its proper divisors (1).

31225425131 is an equidigital number, since it uses as much as digits as its factorization.

31225425131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7200, while the sum is 29.

Adding to 31225425131 its reverse (13152452213), we get a palindrome (44377877344).

The spelling of 31225425131 in words is "thirty-one billion, two hundred twenty-five million, four hundred twenty-five thousand, one hundred thirty-one".