31534643513 has 2 divisors, whose sum is σ = 31534643514. Its totient is φ = 31534643512.

The previous prime is 31534643477. The next prime is 31534643551.

31534643513 is nontrivially palindromic in base 10.

It is an a-pointer prime, because the next prime (31534643551) can be obtained adding 31534643513 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24815070784 + 6719572729 = 157528^2 + 81973^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 31534643513 - 2³⁰ = 30460901689 is a prime.

It is not a weakly prime, because it can be changed into another prime (31534643593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15767321756 + 15767321757.

It is an arithmetic number, because the mean of its divisors is an integer number (15767321757).

Almost surely, 2^31534643513 is an apocalyptic number.

It is an amenable number.

31534643513 is a deficient number, since it is larger than the sum of its proper divisors (1).

31534643513 is an equidigital number, since it uses as much as digits as its factorization.

31534643513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 194400, while the sum is 38.

The spelling of 31534643513 in words is "thirty-one billion, five hundred thirty-four million, six hundred forty-three thousand, five hundred thirteen".