31444533544913 has 2 divisors, whose sum is σ = 31444533544914. Its totient is φ = 31444533544912.

The previous prime is 31444533544883. The next prime is 31444533544933. The reversal of 31444533544913 is 31944533544413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23231792683969 + 8212740860944 = 4819937^2 + 2865788^2 .

It is a cyclic number.

It is not a de Polignac number, because 31444533544913 - 2⁶ = 31444533544849 is a prime.

It is not a weakly prime, because it can be changed into another prime (31444533544933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15722266772456 + 15722266772457.

It is an arithmetic number, because the mean of its divisors is an integer number (15722266772457).

Almost surely, 2^{31444533544913} is an apocalyptic number.

It is an amenable number.

31444533544913 is a deficient number, since it is larger than the sum of its proper divisors (1).

31444533544913 is an equidigital number, since it uses as much as digits as its factorization.

31444533544913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18662400, while the sum is 53.

The spelling of 31444533544913 in words is "thirty-one trillion, four hundred forty-four billion, five hundred thirty-three million, five hundred forty-four thousand, nine hundred thirteen".