163565265 has 8 divisors (see below), whose sum is σ = 261704448. Its totient is φ = 87234800.

The previous prime is 163565263. The next prime is 163565267. The reversal of 163565265 is 562565361.

It is an interprime number because it is at equal distance from previous prime (163565263) and next prime (163565267).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 163565265 - 2¹ = 163565263 is a prime.

It is not an unprimeable number, because it can be changed into a prime (163565263) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5452161 + ... + 5452190.

It is an arithmetic number, because the mean of its divisors is an integer number (32713056).

Almost surely, 2^163565265 is an apocalyptic number.

163565265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

163565265 is a deficient number, since it is larger than the sum of its proper divisors (98139183).

163565265 is a wasteful number, since it uses less digits than its factorization.

163565265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10904359.

The product of its digits is 162000, while the sum is 39.

The square root of 163565265 is about 12789.2636613685. The cubic root of 163565265 is about 546.8862787987.

The spelling of 163565265 in words is "one hundred sixty-three million, five hundred sixty-five thousand, two hundred sixty-five".