165168151 has 4 divisors (see below), whose sum is σ = 165895992. Its totient is φ = 164440312.

The previous prime is 165168119. The next prime is 165168161. The reversal of 165168151 is 151861561.

It is a happy number.

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 165168151 - 2⁵ = 165168119 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 (165168161) 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, 363580 + ... + 364033.

It is an arithmetic number, because the mean of its divisors is an integer number (41473998).

Almost surely, 2^165168151 is an apocalyptic number.

165168151 is a deficient number, since it is larger than the sum of its proper divisors (727841).

165168151 is an equidigital number, since it uses as much as digits as its factorization.

165168151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 727840.

The product of its digits is 7200, while the sum is 34.

The square root of 165168151 is about 12851.7761807464. The cubic root of 165168151 is about 548.6669103115. Note that the first 3 decimals are identical.

The spelling of 165168151 in words is "one hundred sixty-five million, one hundred sixty-eight thousand, one hundred fifty-one".