165297285 has 12 divisors (see below), whose sum is σ = 286515372. Its totient is φ = 88158528.

The previous prime is 165297269. The next prime is 165297311. The reversal of 165297285 is 582792561.

165297285 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 28547649 + 136749636 = 5343^2 + 11694^2 .

It is not a de Polignac number, because 165297285 - 2⁴ = 165297269 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 3673273 = 165297285 / (1 + 6 + 5 + 2 + 9 + 7 + 2 + 8 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 165297285.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1836592 + ... + 1836681.

It is an arithmetic number, because the mean of its divisors is an integer number (23876281).

Almost surely, 2^165297285 is an apocalyptic number.

165297285 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

165297285 is a deficient number, since it is larger than the sum of its proper divisors (121218087).

165297285 is a wasteful number, since it uses less digits than its factorization.

165297285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3673284 (or 3673281 counting only the distinct ones).

The product of its digits is 302400, while the sum is 45.

The square root of 165297285 is about 12856.7991739779. The cubic root of 165297285 is about 548.8098617939.

The spelling of 165297285 in words is "one hundred sixty-five million, two hundred ninety-seven thousand, two hundred eighty-five".