31990014443 has 2 divisors, whose sum is σ = 31990014444. Its totient is φ = 31990014442.

The previous prime is 31990014437. The next prime is 31990014467. The reversal of 31990014443 is 34441009913.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (34441009913) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31990014443 - 2⁸ = 31990014187 is a prime.

It is a super-2 number, since 2×31990014443² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31990014397 and 31990014406.

It is not a weakly prime, because it can be changed into another prime (31990014403) 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, 15995007221 + 15995007222.

It is an arithmetic number, because the mean of its divisors is an integer number (15995007222).

Almost surely, 2^31990014443 is an apocalyptic number.

31990014443 is a deficient number, since it is larger than the sum of its proper divisors (1).

31990014443 is an equidigital number, since it uses as much as digits as its factorization.

31990014443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 38.

The spelling of 31990014443 in words is "thirty-one billion, nine hundred ninety million, fourteen thousand, four hundred forty-three".