31345512529 has 2 divisors, whose sum is σ = 31345512530. Its totient is φ = 31345512528.

The previous prime is 31345512503. The next prime is 31345512563. The reversal of 31345512529 is 92521554313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26339667025 + 5005845504 = 162295^2 + 70752^2 .

It is a cyclic number.

It is not a de Polignac number, because 31345512529 - 2⁹ = 31345512017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31345512491 and 31345512500.

It is not a weakly prime, because it can be changed into another prime (31345512229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15672756264 + 15672756265.

It is an arithmetic number, because the mean of its divisors is an integer number (15672756265).

Almost surely, 2^31345512529 is an apocalyptic number.

It is an amenable number.

31345512529 is a deficient number, since it is larger than the sum of its proper divisors (1).

31345512529 is an equidigital number, since it uses as much as digits as its factorization.

31345512529 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 162000, while the sum is 40.

The spelling of 31345512529 in words is "thirty-one billion, three hundred forty-five million, five hundred twelve thousand, five hundred twenty-nine".