135515772313 has 2 divisors, whose sum is σ = 135515772314. Its totient is φ = 135515772312.

The previous prime is 135515772281. The next prime is 135515772319. The reversal of 135515772313 is 313277515531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92984134489 + 42531637824 = 304933^2 + 206232^2 .

It is a cyclic number.

It is not a de Polignac number, because 135515772313 - 2⁵ = 135515772281 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 135515772313.

It is not a weakly prime, because it can be changed into another prime (135515772319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67757886156 + 67757886157.

It is an arithmetic number, because the mean of its divisors is an integer number (67757886157).

Almost surely, 2^135515772313 is an apocalyptic number.

It is an amenable number.

135515772313 is a deficient number, since it is larger than the sum of its proper divisors (1).

135515772313 is an equidigital number, since it uses as much as digits as its factorization.

135515772313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 330750, while the sum is 43.

The spelling of 135515772313 in words is "one hundred thirty-five billion, five hundred fifteen million, seven hundred seventy-two thousand, three hundred thirteen".