31244433013 has 2 divisors, whose sum is σ = 31244433014. Its totient is φ = 31244433012.

The previous prime is 31244432983. The next prime is 31244433023. The reversal of 31244433013 is 31033444213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29659039524 + 1585393489 = 172218^2 + 39817^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31244433013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31244433023) 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, 15622216506 + 15622216507.

It is an arithmetic number, because the mean of its divisors is an integer number (15622216507).

Almost surely, 2^31244433013 is an apocalyptic number.

It is an amenable number.

31244433013 is a deficient number, since it is larger than the sum of its proper divisors (1).

31244433013 is an equidigital number, since it uses as much as digits as its factorization.

31244433013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 28.

Adding to 31244433013 its reverse (31033444213), we get a palindrome (62277877226).

The spelling of 31244433013 in words is "thirty-one billion, two hundred forty-four million, four hundred thirty-three thousand, thirteen".