281324424181 has 2 divisors, whose sum is σ = 281324424182. Its totient is φ = 281324424180.

The previous prime is 281324424151. The next prime is 281324424191. The reversal of 281324424181 is 181424423182.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 208971493956 + 72352930225 = 457134^2 + 268985^2 .

It is a cyclic number.

It is not a de Polignac number, because 281324424181 - 2²⁵ = 281290869749 is a prime.

It is a super-2 number, since 2×281324424181² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (281324424151) 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, 140662212090 + 140662212091.

It is an arithmetic number, because the mean of its divisors is an integer number (140662212091).

Almost surely, 2^281324424181 is an apocalyptic number.

It is an amenable number.

281324424181 is a deficient number, since it is larger than the sum of its proper divisors (1).

281324424181 is an equidigital number, since it uses as much as digits as its factorization.

281324424181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 98304, while the sum is 40.

Subtracting from 281324424181 its reverse (181424423182), we obtain a palindrome (99900000999).

The spelling of 281324424181 in words is "two hundred eighty-one billion, three hundred twenty-four million, four hundred twenty-four thousand, one hundred eighty-one".