31545020539 has 2 divisors, whose sum is σ = 31545020540. Its totient is φ = 31545020538.

The previous prime is 31545020501. The next prime is 31545020557. The reversal of 31545020539 is 93502054513.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31545020539 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31545020498 and 31545020507.

It is not a weakly prime, because it can be changed into another prime (31545020239) 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, 15772510269 + 15772510270.

It is an arithmetic number, because the mean of its divisors is an integer number (15772510270).

Almost surely, 2^31545020539 is an apocalyptic number.

31545020539 is a deficient number, since it is larger than the sum of its proper divisors (1).

31545020539 is an equidigital number, since it uses as much as digits as its factorization.

31545020539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81000, while the sum is 37.

The spelling of 31545020539 in words is "thirty-one billion, five hundred forty-five million, twenty thousand, five hundred thirty-nine".