2028271317257 has 2 divisors, whose sum is σ = 2028271317258. Its totient is φ = 2028271317256.

The previous prime is 2028271317187. The next prime is 2028271317269. The reversal of 2028271317257 is 7527131728202.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1475777913856 + 552493403401 = 1214816^2 + 743299^2 .

It is a cyclic number.

It is not a de Polignac number, because 2028271317257 - 2¹⁴ = 2028271300873 is a prime.

It is a super-2 number, since 2×2028271317257² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2028271317757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1014135658628 + 1014135658629.

It is an arithmetic number, because the mean of its divisors is an integer number (1014135658629).

Almost surely, 2^{2028271317257} is an apocalyptic number.

It is an amenable number.

2028271317257 is a deficient number, since it is larger than the sum of its proper divisors (1).

2028271317257 is an equidigital number, since it uses as much as digits as its factorization.

2028271317257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 658560, while the sum is 47.

The spelling of 2028271317257 in words is "two trillion, twenty-eight billion, two hundred seventy-one million, three hundred seventeen thousand, two hundred fifty-seven".