2131543203919 has 2 divisors, whose sum is σ = 2131543203920. Its totient is φ = 2131543203918.

The previous prime is 2131543203851. The next prime is 2131543203931. The reversal of 2131543203919 is 9193023451312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2131543203919 - 2¹⁷ = 2131543072847 is a prime.

It is a super-2 number, since 2×2131543203919² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2131543203989) 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, 1065771601959 + 1065771601960.

It is an arithmetic number, because the mean of its divisors is an integer number (1065771601960).

Almost surely, 2^{2131543203919} is an apocalyptic number.

2131543203919 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131543203919 is an equidigital number, since it uses as much as digits as its factorization.

2131543203919 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 174960, while the sum is 43.

The spelling of 2131543203919 in words is "two trillion, one hundred thirty-one billion, five hundred forty-three million, two hundred three thousand, nine hundred nineteen".