165023135 has 4 divisors (see below), whose sum is σ = 198027768. Its totient is φ = 132018504.

The previous prime is 165023123. The next prime is 165023141. The reversal of 165023135 is 531320561.

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

It is a cyclic number.

It is not a de Polignac number, because 165023135 - 2¹² = 165019039 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, 16502309 + ... + 16502318.

It is an arithmetic number, because the mean of its divisors is an integer number (49506942).

Almost surely, 2^165023135 is an apocalyptic number.

165023135 is a deficient number, since it is larger than the sum of its proper divisors (33004633).

165023135 is an equidigital number, since it uses as much as digits as its factorization.

165023135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33004632.

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 165023135 is about 12846.1330757547. The cubic root of 165023135 is about 548.5062885906.

Adding to 165023135 its reverse (531320561), we get a palindrome (696343696).

The spelling of 165023135 in words is "one hundred sixty-five million, twenty-three thousand, one hundred thirty-five".