165642151 has 2 divisors, whose sum is σ = 165642152. Its totient is φ = 165642150.

The previous prime is 165642143. The next prime is 165642167. The reversal of 165642151 is 151246561.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 165642151 - 2³ = 165642143 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165642181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82821075 + 82821076.

It is an arithmetic number, because the mean of its divisors is an integer number (82821076).

Almost surely, 2^165642151 is an apocalyptic number.

165642151 is a deficient number, since it is larger than the sum of its proper divisors (1).

165642151 is an equidigital number, since it uses as much as digits as its factorization.

165642151 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7200, while the sum is 31.

The square root of 165642151 is about 12870.2039999372. The cubic root of 165642151 is about 549.1912642873.

The spelling of 165642151 in words is "one hundred sixty-five million, six hundred forty-two thousand, one hundred fifty-one".