131444281 has 2 divisors, whose sum is σ = 131444282. Its totient is φ = 131444280.

The previous prime is 131444251. The next prime is 131444297. The reversal of 131444281 is 182444131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83557881 + 47886400 = 9141^2 + 6920^2 .

It is an emirp because it is prime and its reverse (182444131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131444281 - 2¹³ = 131436089 is a prime.

It is a super-2 number, since 2×131444281² = 34555198015213922, which contains 22 as substring.

It is equal to p_7455502 and since 131444281 and 7455502 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (131444231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65722140 + 65722141.

It is an arithmetic number, because the mean of its divisors is an integer number (65722141).

Almost surely, 2^131444281 is an apocalyptic number.

It is an amenable number.

131444281 is a deficient number, since it is larger than the sum of its proper divisors (1).

131444281 is an equidigital number, since it uses as much as digits as its factorization.

131444281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3072, while the sum is 28.

The square root of 131444281 is about 11464.9152199220. The cubic root of 131444281 is about 508.4488058973.

The spelling of 131444281 in words is "one hundred thirty-one million, four hundred forty-four thousand, two hundred eighty-one".