131281273 has 2 divisors, whose sum is σ = 131281274. Its totient is φ = 131281272.

The previous prime is 131281247. The next prime is 131281351. The reversal of 131281273 is 372182131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84125584 + 47155689 = 9172^2 + 6867^2 .

It is an emirp because it is prime and its reverse (372182131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131281273 - 2¹³ = 131273081 is a prime.

It is not a weakly prime, because it can be changed into another prime (131281243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65640636 + 65640637.

It is an arithmetic number, because the mean of its divisors is an integer number (65640637).

Almost surely, 2^131281273 is an apocalyptic number.

It is an amenable number.

131281273 is a deficient number, since it is larger than the sum of its proper divisors (1).

131281273 is an equidigital number, since it uses as much as digits as its factorization.

131281273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 28.

The square root of 131281273 is about 11457.8040217138. The cubic root of 131281273 is about 508.2385380761.

The spelling of 131281273 in words is "one hundred thirty-one million, two hundred eighty-one thousand, two hundred seventy-three".