131311273 has 2 divisors, whose sum is σ = 131311274. Its totient is φ = 131311272.

The previous prime is 131311259. The next prime is 131311289. The reversal of 131311273 is 372113131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122478489 + 8832784 = 11067^2 + 2972^2 .

It is a cyclic number.

It is not a de Polignac number, because 131311273 - 2⁵ = 131311241 is a prime.

It is not a weakly prime, because it can be changed into another prime (131311073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65655636 + 65655637.

It is an arithmetic number, because the mean of its divisors is an integer number (65655637).

Almost surely, 2^131311273 is an apocalyptic number.

It is an amenable number.

131311273 is a deficient number, since it is larger than the sum of its proper divisors (1).

131311273 is an equidigital number, since it uses as much as digits as its factorization.

131311273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 378, while the sum is 22.

The square root of 131311273 is about 11459.1130983161. The cubic root of 131311273 is about 508.2772488394.

The spelling of 131311273 in words is "one hundred thirty-one million, three hundred eleven thousand, two hundred seventy-three".