165135413 has 4 divisors (see below), whose sum is σ = 169163148. Its totient is φ = 161107680.

The previous prime is 165135407. The next prime is 165135431. The reversal of 165135413 is 314531561.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 77563249 + 87572164 = 8807^2 + 9358^2 .

It is a cyclic number.

It is not a de Polignac number, because 165135413 - 2⁶ = 165135349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165135493) 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, 2013806 + ... + 2013887.

It is an arithmetic number, because the mean of its divisors is an integer number (42290787).

Almost surely, 2^165135413 is an apocalyptic number.

It is an amenable number.

165135413 is a deficient number, since it is larger than the sum of its proper divisors (4027735).

165135413 is an equidigital number, since it uses as much as digits as its factorization.

165135413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4027734.

The product of its digits is 5400, while the sum is 29.

The square root of 165135413 is about 12850.5024415390. The cubic root of 165135413 is about 548.6306574704.

Adding to 165135413 its reverse (314531561), we get a palindrome (479666974).

The spelling of 165135413 in words is "one hundred sixty-five million, one hundred thirty-five thousand, four hundred thirteen".