31143125393 has 2 divisors, whose sum is σ = 31143125394. Its totient is φ = 31143125392.

The previous prime is 31143125381. The next prime is 31143125411. The reversal of 31143125393 is 39352134113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23337756289 + 7805369104 = 152767^2 + 88348^2 .

It is a cyclic number.

It is not a de Polignac number, because 31143125393 - 2⁶ = 31143125329 is a prime.

It is not a weakly prime, because it can be changed into another prime (31143125323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15571562696 + 15571562697.

It is an arithmetic number, because the mean of its divisors is an integer number (15571562697).

Almost surely, 2^31143125393 is an apocalyptic number.

It is an amenable number.

31143125393 is a deficient number, since it is larger than the sum of its proper divisors (1).

31143125393 is an equidigital number, since it uses as much as digits as its factorization.

31143125393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29160, while the sum is 35.

The spelling of 31143125393 in words is "thirty-one billion, one hundred forty-three million, one hundred twenty-five thousand, three hundred ninety-three".