135831005 has 4 divisors (see below), whose sum is σ = 162997212. Its totient is φ = 108664800.

The previous prime is 135830977. The next prime is 135831029. The reversal of 135831005 is 500138531.

135831005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 500138531 = 31 ⋅16133501.

It can be written as a sum of positive squares in 2 ways, for example, as 83137924 + 52693081 = 9118^2 + 7259^2 .

It is not a de Polignac number, because 135831005 - 2¹⁸ = 135568861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13583096 + ... + 13583105.

It is an arithmetic number, because the mean of its divisors is an integer number (40749303).

Almost surely, 2^135831005 is an apocalyptic number.

It is an amenable number.

135831005 is a deficient number, since it is larger than the sum of its proper divisors (27166207).

135831005 is an equidigital number, since it uses as much as digits as its factorization.

135831005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27166206.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 135831005 is about 11654.6559365775. The cubic root of 135831005 is about 514.0432231110.

Adding to 135831005 its reverse (500138531), we get a palindrome (635969536).

The spelling of 135831005 in words is "one hundred thirty-five million, eight hundred thirty-one thousand, five".