163505105 has 4 divisors (see below), whose sum is σ = 196206132. Its totient is φ = 130804080.

The previous prime is 163505101. The next prime is 163505117. The reversal of 163505105 is 501505361.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 99361024 + 64144081 = 9968^2 + 8009^2 .

It is not a de Polignac number, because 163505105 - 2² = 163505101 is a prime.

It is a super-2 number, since 2×163505105² = 53467838722122050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163505101) 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 3 ways as a sum of consecutive naturals, for example, 16350506 + ... + 16350515.

It is an arithmetic number, because the mean of its divisors is an integer number (49051533).

Almost surely, 2^163505105 is an apocalyptic number.

It is an amenable number.

163505105 is a deficient number, since it is larger than the sum of its proper divisors (32701027).

163505105 is an equidigital number, since it uses as much as digits as its factorization.

163505105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32701026.

The product of its (nonzero) digits is 2250, while the sum is 26.

The square root of 163505105 is about 12786.9114722829. The cubic root of 163505105 is about 546.8192215437.

The spelling of 163505105 in words is "one hundred sixty-three million, five hundred five thousand, one hundred five".