131256211 has 4 divisors (see below), whose sum is σ = 134457624. Its totient is φ = 128054800.

The previous prime is 131256187. The next prime is 131256227. The reversal of 131256211 is 112652131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 112652131 = 43 ⋅2619817.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131256211 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131256241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1600645 + ... + 1600726.

It is an arithmetic number, because the mean of its divisors is an integer number (33614406).

Almost surely, 2^131256211 is an apocalyptic number.

131256211 is a deficient number, since it is larger than the sum of its proper divisors (3201413).

131256211 is an equidigital number, since it uses as much as digits as its factorization.

131256211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3201412.

The product of its digits is 360, while the sum is 22.

The square root of 131256211 is about 11456.7103044460. The cubic root of 131256211 is about 508.2061945829.

The spelling of 131256211 in words is "one hundred thirty-one million, two hundred fifty-six thousand, two hundred eleven".