31043561113 has 2 divisors, whose sum is σ = 31043561114. Its totient is φ = 31043561112.

The previous prime is 31043561099. The next prime is 31043561123. The reversal of 31043561113 is 31116534013.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21394035289 + 9649525824 = 146267^2 + 98232^2 .

It is a cyclic number.

It is not a de Polignac number, because 31043561113 - 2¹³ = 31043552921 is a prime.

It is a super-3 number, since 3×31043561113³ (a number of 32 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (31043561123) 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, 15521780556 + 15521780557.

It is an arithmetic number, because the mean of its divisors is an integer number (15521780557).

Almost surely, 2^31043561113 is an apocalyptic number.

It is an amenable number.

31043561113 is a deficient number, since it is larger than the sum of its proper divisors (1).

31043561113 is an equidigital number, since it uses as much as digits as its factorization.

31043561113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 28.

The spelling of 31043561113 in words is "thirty-one billion, forty-three million, five hundred sixty-one thousand, one hundred thirteen".