1996171231 has 2 divisors, whose sum is σ = 1996171232. Its totient is φ = 1996171230.

The previous prime is 1996171213. The next prime is 1996171271. The reversal of 1996171231 is 1321716991.

Together with previous prime (1996171213) it forms an Ormiston pair, because they use the same digits, order apart.

It is an a-pointer prime, because the next prime (1996171271) can be obtained adding 1996171231 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1996171231 - 2²⁹ = 1459300319 is a prime.

It is a super-2 number, since 2×1996171231² = 7969399166944110722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1996171211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 998085615 + 998085616.

It is an arithmetic number, because the mean of its divisors is an integer number (998085616).

Almost surely, 2^1996171231 is an apocalyptic number.

1996171231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1996171231 is an equidigital number, since it uses as much as digits as its factorization.

1996171231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20412, while the sum is 40.

The square root of 1996171231 is about 44678.5321043563. The cubic root of 1996171231 is about 1259.1165451894.

The spelling of 1996171231 in words is "one billion, nine hundred ninety-six million, one hundred seventy-one thousand, two hundred thirty-one".