135311601 has 4 divisors (see below), whose sum is σ = 180415472. Its totient is φ = 90207732.

The previous prime is 135311581. The next prime is 135311623. The reversal of 135311601 is 106113531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 135311601 - 2⁶ = 135311537 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (135311641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22551931 + ... + 22551936.

It is an arithmetic number, because the mean of its divisors is an integer number (45103868).

Almost surely, 2^135311601 is an apocalyptic number.

It is an amenable number.

135311601 is a deficient number, since it is larger than the sum of its proper divisors (45103871).

135311601 is an equidigital number, since it uses as much as digits as its factorization.

135311601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45103870.

The product of its (nonzero) digits is 270, while the sum is 21.

The square root of 135311601 is about 11632.3514819661. The cubic root of 135311601 is about 513.3871697720.

The spelling of 135311601 in words is "one hundred thirty-five million, three hundred eleven thousand, six hundred one".