165040501 has 2 divisors, whose sum is σ = 165040502. Its totient is φ = 165040500.

The previous prime is 165040489. The next prime is 165040531. The reversal of 165040501 is 105040561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87142225 + 77898276 = 9335^2 + 8826^2 .

It is a cyclic number.

It is not a de Polignac number, because 165040501 - 2²¹ = 162943349 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 (165040531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82520250 + 82520251.

It is an arithmetic number, because the mean of its divisors is an integer number (82520251).

Almost surely, 2^165040501 is an apocalyptic number.

It is an amenable number.

165040501 is a deficient number, since it is larger than the sum of its proper divisors (1).

165040501 is an equidigital number, since it uses as much as digits as its factorization.

165040501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 165040501 is about 12846.8089812218. The cubic root of 165040501 is about 548.5255283699.

The spelling of 165040501 in words is "one hundred sixty-five million, forty thousand, five hundred one".