31142199329 has 2 divisors, whose sum is σ = 31142199330. Its totient is φ = 31142199328.

The previous prime is 31142199229. The next prime is 31142199353. The reversal of 31142199329 is 92399124113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31125780625 + 16418704 = 176425^2 + 4052^2 .

It is a cyclic number.

It is not a de Polignac number, because 31142199329 - 2⁸ = 31142199073 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31142199329.

It is not a weakly prime, because it can be changed into another prime (31142199379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15571099664 + 15571099665.

It is an arithmetic number, because the mean of its divisors is an integer number (15571099665).

Almost surely, 2^31142199329 is an apocalyptic number.

It is an amenable number.

31142199329 is a deficient number, since it is larger than the sum of its proper divisors (1).

31142199329 is an equidigital number, since it uses as much as digits as its factorization.

31142199329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 104976, while the sum is 44.

The spelling of 31142199329 in words is "thirty-one billion, one hundred forty-two million, one hundred ninety-nine thousand, three hundred twenty-nine".