31530840563 has 2 divisors, whose sum is σ = 31530840564. Its totient is φ = 31530840562.

The previous prime is 31530840533. The next prime is 31530840569. The reversal of 31530840563 is 36504803513.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31530840563 - 2⁸ = 31530840307 is a prime.

It is not a weakly prime, because it can be changed into another prime (31530840569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15765420281 + 15765420282.

It is an arithmetic number, because the mean of its divisors is an integer number (15765420282).

Almost surely, 2^31530840563 is an apocalyptic number.

31530840563 is a deficient number, since it is larger than the sum of its proper divisors (1).

31530840563 is an equidigital number, since it uses as much as digits as its factorization.

31530840563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129600, while the sum is 38.

The spelling of 31530840563 in words is "thirty-one billion, five hundred thirty million, eight hundred forty thousand, five hundred sixty-three".