165265250 has 16 divisors (see below), whose sum is σ = 309377016. Its totient is φ = 66106000.

The previous prime is 165265237. The next prime is 165265253. The reversal of 165265250 is 52562561.

It can be written as a sum of positive squares in 4 ways, for example, as 76510009 + 88755241 = 8747^2 + 9421^2 .

It is not an unprimeable number, because it can be changed into a prime (165265253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 330281 + ... + 330780.

Almost surely, 2^165265250 is an apocalyptic number.

165265250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165265250 is a deficient number, since it is larger than the sum of its proper divisors (144111766).

165265250 is an equidigital number, since it uses as much as digits as its factorization.

165265250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661078 (or 661068 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 165265250 is about 12855.5532747525. The cubic root of 165265250 is about 548.7744059589.

The spelling of 165265250 in words is "one hundred sixty-five million, two hundred sixty-five thousand, two hundred fifty".