2031172543 has 2 divisors, whose sum is σ = 2031172544. Its totient is φ = 2031172542.

The previous prime is 2031172541. The next prime is 2031172567. The reversal of 2031172543 is 3452711302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2031172543 - 2¹ = 2031172541 is a prime.

Together with 2031172541, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2031172541) 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, 1015586271 + 1015586272.

It is an arithmetic number, because the mean of its divisors is an integer number (1015586272).

Almost surely, 2^2031172543 is an apocalyptic number.

2031172543 is a deficient number, since it is larger than the sum of its proper divisors (1).

2031172543 is an equidigital number, since it uses as much as digits as its factorization.

2031172543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 2031172543 is about 45068.5316268458. The cubic root of 2031172543 is about 1266.4331568705.

Adding to 2031172543 its reverse (3452711302), we get a palindrome (5483883845).

It can be divided in two parts, 203 and 1172543, that added together give a triangular number (1172746 = T₁₅₃₁).

The spelling of 2031172543 in words is "two billion, thirty-one million, one hundred seventy-two thousand, five hundred forty-three".