131311 has 2 divisors, whose sum is σ = 131312. Its totient is φ = 131310.

The previous prime is 131303. The next prime is 131317. The reversal of 131311 is 113131.

It is a strong prime.

It is an emirp because it is prime and its reverse (113131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131311 - 2³ = 131303 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65655 + 65656.

It is an arithmetic number, because the mean of its divisors is an integer number (65656).

2¹³¹³¹¹ is an apocalyptic number.

131311 is a deficient number, since it is larger than the sum of its proper divisors (1).

131311 is an equidigital number, since it uses as much as digits as its factorization.

131311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9, while the sum is 10.

The square root of 131311 is about 362.3685968734. The cubic root of 131311 is about 50.8276896598.

Adding to 131311 its reverse (113131), we get a palindrome (244442).

The spelling of 131311 in words is "one hundred thirty-one thousand, three hundred eleven".