165051247 has 2 divisors, whose sum is σ = 165051248. Its totient is φ = 165051246.

The previous prime is 165051193. The next prime is 165051253. The reversal of 165051247 is 742150561.

It is a strong prime.

It is an emirp because it is prime and its reverse (742150561) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165051247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165051647) 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, 82525623 + 82525624.

It is an arithmetic number, because the mean of its divisors is an integer number (82525624).

Almost surely, 2^165051247 is an apocalyptic number.

165051247 is a deficient number, since it is larger than the sum of its proper divisors (1).

165051247 is an equidigital number, since it uses as much as digits as its factorization.

165051247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 165051247 is about 12847.2272105696. The cubic root of 165051247 is about 548.5374331799.

The spelling of 165051247 in words is "one hundred sixty-five million, fifty-one thousand, two hundred forty-seven".