165615101 has 2 divisors, whose sum is σ = 165615102. Its totient is φ = 165615100.

The previous prime is 165615083. The next prime is 165615137. The reversal of 165615101 is 101516561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 138627076 + 26988025 = 11774^2 + 5195^2 .

It is a cyclic number.

It is not a de Polignac number, because 165615101 - 2²⁶ = 98506237 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165615161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82807550 + 82807551.

It is an arithmetic number, because the mean of its divisors is an integer number (82807551).

Almost surely, 2^165615101 is an apocalyptic number.

It is an amenable number.

165615101 is a deficient number, since it is larger than the sum of its proper divisors (1).

165615101 is an equidigital number, since it uses as much as digits as its factorization.

165615101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 900, while the sum is 26.

The square root of 165615101 is about 12869.1530801370. The cubic root of 165615101 is about 549.1613676450.

The spelling of 165615101 in words is "one hundred sixty-five million, six hundred fifteen thousand, one hundred one".