2131543203989 has 2 divisors, whose sum is σ = 2131543203990. Its totient is φ = 2131543203988.

The previous prime is 2131543203973. The next prime is 2131543204003. The reversal of 2131543203989 is 9893023451312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1889044080625 + 242499123364 = 1374425^2 + 492442^2 .

It is a cyclic number.

It is not a de Polignac number, because 2131543203989 - 2⁴ = 2131543203973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2131543203919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065771601994 + 1065771601995.

It is an arithmetic number, because the mean of its divisors is an integer number (1065771601995).

Almost surely, 2^{2131543203989} is an apocalyptic number.

It is an amenable number.

2131543203989 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131543203989 is an equidigital number, since it uses as much as digits as its factorization.

2131543203989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1399680, while the sum is 50.

It can be divided in two parts, 213154 and 3203989, that added together give a palindrome (3417143).

The spelling of 2131543203989 in words is "two trillion, one hundred thirty-one billion, five hundred forty-three million, two hundred three thousand, nine hundred eighty-nine".