255421155402197 has 2 divisors, whose sum is σ = 255421155402198. Its totient is φ = 255421155402196.

The previous prime is 255421155402181. The next prime is 255421155402229. The reversal of 255421155402197 is 791204551124552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 177778728890161 + 77642426512036 = 13333369^2 + 8811494^2 .

It is a cyclic number.

It is not a de Polignac number, because 255421155402197 - 2⁴ = 255421155402181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255421155404197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127710577701098 + 127710577701099.

It is an arithmetic number, because the mean of its divisors is an integer number (127710577701099).

Almost surely, 2^{255421155402197} is an apocalyptic number.

It is an amenable number.

255421155402197 is a deficient number, since it is larger than the sum of its proper divisors (1).

255421155402197 is an equidigital number, since it uses as much as digits as its factorization.

255421155402197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040000, while the sum is 53.

The spelling of 255421155402197 in words is "two hundred fifty-five trillion, four hundred twenty-one billion, one hundred fifty-five million, four hundred two thousand, one hundred ninety-seven".