281258041081 has 2 divisors, whose sum is σ = 281258041082. Its totient is φ = 281258041080.

The previous prime is 281258041073. The next prime is 281258041139. The reversal of 281258041081 is 180140852182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 182734875625 + 98523165456 = 427475^2 + 313884^2 .

It is a cyclic number.

It is not a de Polignac number, because 281258041081 - 2³ = 281258041073 is a prime.

It is a super-2 number, since 2×281258041081² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (281258041381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140629020540 + 140629020541.

It is an arithmetic number, because the mean of its divisors is an integer number (140629020541).

Almost surely, 2^281258041081 is an apocalyptic number.

It is an amenable number.

281258041081 is a deficient number, since it is larger than the sum of its proper divisors (1).

281258041081 is an equidigital number, since it uses as much as digits as its factorization.

281258041081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40960, while the sum is 40.

The spelling of 281258041081 in words is "two hundred eighty-one billion, two hundred fifty-eight million, forty-one thousand, eighty-one".