165335403 has 4 divisors (see below), whose sum is σ = 220447208. Its totient is φ = 110223600.

The previous prime is 165335393. The next prime is 165335407. The reversal of 165335403 is 304533561.

It is a happy number.

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

It is not a de Polignac number, because 165335403 - 2⁵ = 165335371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165335407) 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, 27555898 + ... + 27555903.

It is an arithmetic number, because the mean of its divisors is an integer number (55111802).

Almost surely, 2^165335403 is an apocalyptic number.

165335403 is a deficient number, since it is larger than the sum of its proper divisors (55111805).

165335403 is an equidigital number, since it uses as much as digits as its factorization.

165335403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55111804.

The product of its (nonzero) digits is 16200, while the sum is 30.

The square root of 165335403 is about 12858.2814948188. The cubic root of 165335403 is about 548.8520442300.

Adding to 165335403 its reverse (304533561), we get a palindrome (469868964).

The spelling of 165335403 in words is "one hundred sixty-five million, three hundred thirty-five thousand, four hundred three".