131211441 has 16 divisors (see below), whose sum is σ = 197053120. Its totient is φ = 86274720.

The previous prime is 131211433. The next prime is 131211467. The reversal of 131211441 is 144112131.

131211441 is a `hidden beast` number, since 13 + 1 + 211 + 441 = 666.

It is not a de Polignac number, because 131211441 - 2³ = 131211433 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (131211541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31315 + ... + 35256.

It is an arithmetic number, because the mean of its divisors is an integer number (12315820).

Almost surely, 2^131211441 is an apocalyptic number.

It is an amenable number.

131211441 is a deficient number, since it is larger than the sum of its proper divisors (65841679).

131211441 is an equidigital number, since it uses as much as digits as its factorization.

131211441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66653 (or 66647 counting only the distinct ones).

The product of its digits is 96, while the sum is 18.

The square root of 131211441 is about 11454.7562610472. The cubic root of 131211441 is about 508.1484068955.

Adding to 131211441 its reverse (144112131), we get a palindrome (275323572).

The spelling of 131211441 in words is "one hundred thirty-one million, two hundred eleven thousand, four hundred forty-one".