165775247 has 16 divisors (see below), whose sum is σ = 193499520. Its totient is φ = 140421600.

The previous prime is 165775241. The next prime is 165775271. The reversal of 165775247 is 742577561.

It is not a de Polignac number, because 165775247 - 2¹⁴ = 165758863 is a prime.

It is a super-2 number, since 2×165775247² = 54962865035822018, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165775198 and 165775207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165775241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6248 + ... + 19250.

It is an arithmetic number, because the mean of its divisors is an integer number (12093720).

Almost surely, 2^165775247 is an apocalyptic number.

165775247 is a deficient number, since it is larger than the sum of its proper divisors (27724273).

165775247 is a wasteful number, since it uses less digits than its factorization.

165775247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13094.

The product of its digits is 411600, while the sum is 44.

The square root of 165775247 is about 12875.3736644806. The cubic root of 165775247 is about 549.3383194322.

The spelling of 165775247 in words is "one hundred sixty-five million, seven hundred seventy-five thousand, two hundred forty-seven".