31443503542013 has 2 divisors, whose sum is σ = 31443503542014. Its totient is φ = 31443503542012.

The previous prime is 31443503541991. The next prime is 31443503542093. The reversal of 31443503542013 is 31024530534413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25452963378649 + 5990540163364 = 5045093^2 + 2447558^2 .

It is a cyclic number.

It is not a de Polignac number, because 31443503542013 - 2¹⁶ = 31443503476477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31443503542093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15721751771006 + 15721751771007.

It is an arithmetic number, because the mean of its divisors is an integer number (15721751771007).

Almost surely, 2^{31443503542013} is an apocalyptic number.

It is an amenable number.

31443503542013 is a deficient number, since it is larger than the sum of its proper divisors (1).

31443503542013 is an equidigital number, since it uses as much as digits as its factorization.

31443503542013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 259200, while the sum is 38.

The spelling of 31443503542013 in words is "thirty-one trillion, four hundred forty-three billion, five hundred three million, five hundred forty-two thousand, thirteen".