2131189843 has 2 divisors, whose sum is σ = 2131189844. Its totient is φ = 2131189842.

The previous prime is 2131189741. The next prime is 2131189859. The reversal of 2131189843 is 3489811312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2131189843 - 2¹³ = 2131181651 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2131189796 and 2131189805.

It is not a weakly prime, because it can be changed into another prime (2131189243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065594921 + 1065594922.

It is an arithmetic number, because the mean of its divisors is an integer number (1065594922).

Almost surely, 2^2131189843 is an apocalyptic number.

2131189843 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131189843 is an equidigital number, since it uses as much as digits as its factorization.

2131189843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 40.

The square root of 2131189843 is about 46164.8117401122. The cubic root of 2131189843 is about 1286.8878855839.

The spelling of 2131189843 in words is "two billion, one hundred thirty-one million, one hundred eighty-nine thousand, eight hundred forty-three".