165335013 has 32 divisors (see below), whose sum is σ = 262609920. Its totient is φ = 103716288.

The previous prime is 165334991. The next prime is 165335021. The reversal of 165335013 is 310533561.

165335013 is a `hidden beast` number, since 1 + 653 + 3 + 5 + 0 + 1 + 3 = 666.

It is not a de Polignac number, because 165335013 - 2¹⁶ = 165269477 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165335113) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34956 + ... + 39402.

It is an arithmetic number, because the mean of its divisors is an integer number (8206560).

Almost surely, 2^165335013 is an apocalyptic number.

It is an amenable number.

165335013 is a deficient number, since it is larger than the sum of its proper divisors (97274907).

165335013 is an frugal number, since it uses more digits than its factorization.

165335013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4485 (or 4467 counting only the distinct ones).

The product of its (nonzero) digits is 4050, while the sum is 27.

The square root of 165335013 is about 12858.2663294863. The cubic root of 165335013 is about 548.8516126780.

Adding to 165335013 its reverse (310533561), we get a palindrome (475868574).

The spelling of 165335013 in words is "one hundred sixty-five million, three hundred thirty-five thousand, thirteen".