165265155 has 48 divisors (see below), whose sum is σ = 314911584. Its totient is φ = 79511040.

The previous prime is 165265147. The next prime is 165265157. The reversal of 165265155 is 551562561.

It is not a de Polignac number, because 165265155 - 2³ = 165265147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165265157) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 66597 + ... + 69033.

It is an arithmetic number, because the mean of its divisors is an integer number (6560658).

Almost surely, 2^165265155 is an apocalyptic number.

165265155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

165265155 is a deficient number, since it is larger than the sum of its proper divisors (149646429).

165265155 is a wasteful number, since it uses less digits than its factorization.

165265155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2596 (or 2593 counting only the distinct ones).

The product of its digits is 45000, while the sum is 36.

The square root of 165265155 is about 12855.5495798507. The cubic root of 165265155 is about 548.7743008076.

The spelling of 165265155 in words is "one hundred sixty-five million, two hundred sixty-five thousand, one hundred fifty-five".