135311565 has 16 divisors (see below), whose sum is σ = 216680256. Its totient is φ = 72105600.

The previous prime is 135311563. The next prime is 135311567. The reversal of 135311565 is 565113531.

It is an interprime number because it is at equal distance from previous prime (135311563) and next prime (135311567).

It is not a de Polignac number, because 135311565 - 2¹ = 135311563 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135311563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19170 + ... + 25260.

It is an arithmetic number, because the mean of its divisors is an integer number (13542516).

Almost surely, 2^135311565 is an apocalyptic number.

135311565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

135311565 is a deficient number, since it is larger than the sum of its proper divisors (81368691).

135311565 is a wasteful number, since it uses less digits than its factorization.

135311565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7580.

The product of its digits is 6750, while the sum is 30.

The square root of 135311565 is about 11632.3499345575. The cubic root of 135311565 is about 513.3871242427.

The spelling of 135311565 in words is "one hundred thirty-five million, three hundred eleven thousand, five hundred sixty-five".