131143211 has 2 divisors, whose sum is σ = 131143212. Its totient is φ = 131143210.

The previous prime is 131143153. The next prime is 131143223. The reversal of 131143211 is 112341131.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131143211 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131143211.

It is not a weakly prime, because it can be changed into another prime (131143261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65571605 + 65571606.

It is an arithmetic number, because the mean of its divisors is an integer number (65571606).

Almost surely, 2^131143211 is an apocalyptic number.

131143211 is a deficient number, since it is larger than the sum of its proper divisors (1).

131143211 is an equidigital number, since it uses as much as digits as its factorization.

131143211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72, while the sum is 17.

The square root of 131143211 is about 11451.7776349351. Note that the first 3 decimals coincide. The cubic root of 131143211 is about 508.0603125014.

Adding to 131143211 its reverse (112341131), we get a palindrome (243484342).

The spelling of 131143211 in words is "one hundred thirty-one million, one hundred forty-three thousand, two hundred eleven".