163165025 has 6 divisors (see below), whose sum is σ = 202324662. Its totient is φ = 130532000.

The previous prime is 163165021. The next prime is 163165039. The reversal of 163165025 is 520561361.

It can be written as a sum of positive squares in 3 ways, for example, as 35904064 + 127260961 = 5992^2 + 11281^2 .

It is not a de Polignac number, because 163165025 - 2² = 163165021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (163165021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3263276 + ... + 3263325.

It is an arithmetic number, because the mean of its divisors is an integer number (33720777).

Almost surely, 2^163165025 is an apocalyptic number.

It is an amenable number.

163165025 is a deficient number, since it is larger than the sum of its proper divisors (39159637).

163165025 is an equidigital number, since it uses as much as digits as its factorization.

163165025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6526611 (or 6526606 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 163165025 is about 12773.6065776272. The cubic root of 163165025 is about 546.4398422376.

The spelling of 163165025 in words is "one hundred sixty-three million, one hundred sixty-five thousand, twenty-five".