31816324219 has 2 divisors, whose sum is σ = 31816324220. Its totient is φ = 31816324218.

The previous prime is 31816324213. The next prime is 31816324249. The reversal of 31816324219 is 91242361813.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31816324219 - 2¹³ = 31816316027 is a prime.

It is a super-2 number, since 2×31816324219² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31816324213) 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, 15908162109 + 15908162110.

It is an arithmetic number, because the mean of its divisors is an integer number (15908162110).

Almost surely, 2^31816324219 is an apocalyptic number.

31816324219 is a deficient number, since it is larger than the sum of its proper divisors (1).

31816324219 is an equidigital number, since it uses as much as digits as its factorization.

31816324219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 40.

The spelling of 31816324219 in words is "thirty-one billion, eight hundred sixteen million, three hundred twenty-four thousand, two hundred nineteen".