2131043191 has 2 divisors, whose sum is σ = 2131043192. Its totient is φ = 2131043190.

The previous prime is 2131043171. The next prime is 2131043273. The reversal of 2131043191 is 1913401312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2131043191 - 2¹³ = 2131034999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2131043141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065521595 + 1065521596.

It is an arithmetic number, because the mean of its divisors is an integer number (1065521596).

Almost surely, 2^2131043191 is an apocalyptic number.

2131043191 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131043191 is an equidigital number, since it uses as much as digits as its factorization.

2131043191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 2131043191 is about 46163.2233601598. The cubic root of 2131043191 is about 1286.8583670168.

The spelling of 2131043191 in words is "two billion, one hundred thirty-one million, forty-three thousand, one hundred ninety-one".