255102155453521 has 2 divisors, whose sum is σ = 255102155453522. Its totient is φ = 255102155453520.

The previous prime is 255102155453479. The next prime is 255102155453599. The reversal of 255102155453521 is 125354551201552.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 242937860023296 + 12164295430225 = 15586464^2 + 3487735^2 .

It is a cyclic number.

It is not a de Polignac number, because 255102155453521 - 2¹⁷ = 255102155322449 is a prime.

It is not a weakly prime, because it can be changed into another prime (255102155454521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127551077726760 + 127551077726761.

It is an arithmetic number, because the mean of its divisors is an integer number (127551077726761).

Almost surely, 2^{255102155453521} is an apocalyptic number.

It is an amenable number.

255102155453521 is a deficient number, since it is larger than the sum of its proper divisors (1).

255102155453521 is an equidigital number, since it uses as much as digits as its factorization.

255102155453521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1500000, while the sum is 46.

The spelling of 255102155453521 in words is "two hundred fifty-five trillion, one hundred two billion, one hundred fifty-five million, four hundred fifty-three thousand, five hundred twenty-one".