131036281 has 2 divisors, whose sum is σ = 131036282. Its totient is φ = 131036280.

The previous prime is 131036261. The next prime is 131036303. The reversal of 131036281 is 182630131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81812025 + 49224256 = 9045^2 + 7016^2 .

It is a cyclic number.

It is not a de Polignac number, because 131036281 - 2¹³ = 131028089 is a prime.

It is a super-2 number, since 2×131036281² = 34341013876621922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (131036231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65518140 + 65518141.

It is an arithmetic number, because the mean of its divisors is an integer number (65518141).

Almost surely, 2^131036281 is an apocalyptic number.

It is an amenable number.

131036281 is a deficient number, since it is larger than the sum of its proper divisors (1).

131036281 is an equidigital number, since it uses as much as digits as its factorization.

131036281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 131036281 is about 11447.1079753796. The cubic root of 131036281 is about 507.9221895518.

The spelling of 131036281 in words is "one hundred thirty-one million, thirty-six thousand, two hundred eighty-one".