135310235257 has 2 divisors, whose sum is σ = 135310235258. Its totient is φ = 135310235256.

The previous prime is 135310235201. The next prime is 135310235273. The reversal of 135310235257 is 752532013531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73562458176 + 61747777081 = 271224^2 + 248491^2 .

It is a cyclic number.

It is not a de Polignac number, because 135310235257 - 2¹¹ = 135310233209 is a prime.

It is not a weakly prime, because it can be changed into another prime (135310235297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67655117628 + 67655117629.

It is an arithmetic number, because the mean of its divisors is an integer number (67655117629).

Almost surely, 2^135310235257 is an apocalyptic number.

It is an amenable number.

135310235257 is a deficient number, since it is larger than the sum of its proper divisors (1).

135310235257 is an equidigital number, since it uses as much as digits as its factorization.

135310235257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 94500, while the sum is 37.

Adding to 135310235257 its reverse (752532013531), we get a palindrome (887842248788).

The spelling of 135310235257 in words is "one hundred thirty-five billion, three hundred ten million, two hundred thirty-five thousand, two hundred fifty-seven".