163520353 has 4 divisors (see below), whose sum is σ = 167939860. Its totient is φ = 159100848.

The previous prime is 163520347. The next prime is 163520359. The reversal of 163520353 is 353025361.

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

It is an interprime number because it is at equal distance from previous prime (163520347) and next prime (163520359).

It can be written as a sum of positive squares in 2 ways, for example, as 121374289 + 42146064 = 11017^2 + 6492^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-163520353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163520359) 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, 2209698 + ... + 2209771.

It is an arithmetic number, because the mean of its divisors is an integer number (41984965).

Almost surely, 2^163520353 is an apocalyptic number.

It is an amenable number.

163520353 is a deficient number, since it is larger than the sum of its proper divisors (4419507).

163520353 is an equidigital number, since it uses as much as digits as its factorization.

163520353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4419506.

The product of its (nonzero) digits is 8100, while the sum is 28.

The square root of 163520353 is about 12787.5076930573. The cubic root of 163520353 is about 546.8362192603.

The spelling of 163520353 in words is "one hundred sixty-three million, five hundred twenty thousand, three hundred fifty-three".