163216255 has 4 divisors (see below), whose sum is σ = 195859512. Its totient is φ = 130573000.

The previous prime is 163216241. The next prime is 163216259. The reversal of 163216255 is 552612361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 552612361 = 7 ⋅78944623.

It is not a de Polignac number, because 163216255 - 2⁷ = 163216127 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163216259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16321621 + ... + 16321630.

It is an arithmetic number, because the mean of its divisors is an integer number (48964878).

Almost surely, 2^163216255 is an apocalyptic number.

163216255 is a deficient number, since it is larger than the sum of its proper divisors (32643257).

163216255 is an equidigital number, since it uses as much as digits as its factorization.

163216255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32643256.

The product of its digits is 10800, while the sum is 31.

The square root of 163216255 is about 12775.6117270368. The cubic root of 163216255 is about 546.4970260280.

The spelling of 163216255 in words is "one hundred sixty-three million, two hundred sixteen thousand, two hundred fifty-five".