2135187273257 has 2 divisors, whose sum is σ = 2135187273258. Its totient is φ = 2135187273256.

The previous prime is 2135187273251. The next prime is 2135187273379. The reversal of 2135187273257 is 7523727815312.

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., 1963638887401 + 171548385856 = 1401299^2 + 414184^2 .

It is a cyclic number.

It is not a de Polignac number, because 2135187273257 - 2¹⁰ = 2135187272233 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2135187273199 and 2135187273208.

It is not a weakly prime, because it can be changed into another prime (2135187273251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1067593636628 + 1067593636629.

It is an arithmetic number, because the mean of its divisors is an integer number (1067593636629).

Almost surely, 2^{2135187273257} is an apocalyptic number.

It is an amenable number.

2135187273257 is a deficient number, since it is larger than the sum of its proper divisors (1).

2135187273257 is an equidigital number, since it uses as much as digits as its factorization.

2135187273257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4939200, while the sum is 53.

The spelling of 2135187273257 in words is "two trillion, one hundred thirty-five billion, one hundred eighty-seven million, two hundred seventy-three thousand, two hundred fifty-seven".