165255247 has 2 divisors, whose sum is σ = 165255248. Its totient is φ = 165255246.

The previous prime is 165255199. The next prime is 165255271. The reversal of 165255247 is 742552561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 165255247 - 2⁷ = 165255119 is a prime.

It is a super-2 number, since 2×165255247² = 54618593322062018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165255547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82627623 + 82627624.

It is an arithmetic number, because the mean of its divisors is an integer number (82627624).

Almost surely, 2^165255247 is an apocalyptic number.

165255247 is a deficient number, since it is larger than the sum of its proper divisors (1).

165255247 is an equidigital number, since it uses as much as digits as its factorization.

165255247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84000, while the sum is 37.

The square root of 165255247 is about 12855.1642152094. The cubic root of 165255247 is about 548.7633338568.

The spelling of 165255247 in words is "one hundred sixty-five million, two hundred fifty-five thousand, two hundred forty-seven".