31443442319 has 2 divisors, whose sum is σ = 31443442320. Its totient is φ = 31443442318.

The previous prime is 31443442313. The next prime is 31443442333. The reversal of 31443442319 is 91324434413.

It is a weak prime.

It is an emirp because it is prime and its reverse (91324434413) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31443442319 is a prime.

It is a super-2 number, since 2×31443442319² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31443442313) 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, 15721721159 + 15721721160.

It is an arithmetic number, because the mean of its divisors is an integer number (15721721160).

Almost surely, 2^31443442319 is an apocalyptic number.

31443442319 is a deficient number, since it is larger than the sum of its proper divisors (1).

31443442319 is an equidigital number, since it uses as much as digits as its factorization.

31443442319 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 38.

The spelling of 31443442319 in words is "thirty-one billion, four hundred forty-three million, four hundred forty-two thousand, three hundred nineteen".