165151 has 4 divisors (see below), whose sum is σ = 188752. Its totient is φ = 141552.

The previous prime is 165133. The next prime is 165161. The reversal of 165151 is 151561.

165151 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 165151 - 2¹⁵ = 132383 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 (165161) 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, 11790 + ... + 11803.

It is an arithmetic number, because the mean of its divisors is an integer number (47188).

2¹⁶⁵¹⁵¹ is an apocalyptic number.

165151 is a deficient number, since it is larger than the sum of its proper divisors (23601).

165151 is an equidigital number, since it uses as much as digits as its factorization.

165151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23600.

The product of its digits is 150, while the sum is 19.

The square root of 165151 is about 406.3877458782. The cubic root of 165151 is about 54.8647918531.

The spelling of 165151 in words is "one hundred sixty-five thousand, one hundred fifty-one".