255100708021 has 2 divisors, whose sum is σ = 255100708022. Its totient is φ = 255100708020.

The previous prime is 255100708001. The next prime is 255100708043. The reversal of 255100708021 is 120807001552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 152517586225 + 102583121796 = 390535^2 + 320286^2 .

It is a cyclic number.

It is not a de Polignac number, because 255100708021 - 2⁵ = 255100707989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255100708001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127550354010 + 127550354011.

It is an arithmetic number, because the mean of its divisors is an integer number (127550354011).

Almost surely, 2^255100708021 is an apocalyptic number.

It is an amenable number.

255100708021 is a deficient number, since it is larger than the sum of its proper divisors (1).

255100708021 is an equidigital number, since it uses as much as digits as its factorization.

255100708021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5600, while the sum is 31.

Adding to 255100708021 its reverse (120807001552), we get a palindrome (375907709573).

The spelling of 255100708021 in words is "two hundred fifty-five billion, one hundred million, seven hundred eight thousand, twenty-one".