31065243841 has 2 divisors, whose sum is σ = 31065243842. Its totient is φ = 31065243840.

The previous prime is 31065243799. The next prime is 31065243877. The reversal of 31065243841 is 14834256013.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29749005441 + 1316238400 = 172479^2 + 36280^2 .

It is a cyclic number.

It is not a de Polignac number, because 31065243841 - 2⁹ = 31065243329 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31065243841.

It is not a weakly prime, because it can be changed into another prime (31065244841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15532621920 + 15532621921.

It is an arithmetic number, because the mean of its divisors is an integer number (15532621921).

Almost surely, 2^31065243841 is an apocalyptic number.

It is an amenable number.

31065243841 is a deficient number, since it is larger than the sum of its proper divisors (1).

31065243841 is an equidigital number, since it uses as much as digits as its factorization.

31065243841 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 37.

Adding to 31065243841 its reverse (14834256013), we get a palindrome (45899499854).

The spelling of 31065243841 in words is "thirty-one billion, sixty-five million, two hundred forty-three thousand, eight hundred forty-one".