8216255 has 4 divisors (see below), whose sum is σ = 9859512. Its totient is φ = 6573000.

The previous prime is 8216231. The next prime is 8216269. The reversal of 8216255 is 5526128.

8216255 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a de Polignac number, because none of the positive numbers 2^k-8216255 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 821621 + ... + 821630.

It is an arithmetic number, because the mean of its divisors is an integer number (2464878).

Almost surely, 2^8216255 is an apocalyptic number.

8216255 is a deficient number, since it is larger than the sum of its proper divisors (1643257).

8216255 is a wasteful number, since it uses less digits than its factorization.

8216255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1643256.

The product of its digits is 4800, while the sum is 29.

The square root of 8216255 is about 2866.4010535862. The cubic root of 8216255 is about 201.7861262797.

The spelling of 8216255 in words is "eight million, two hundred sixteen thousand, two hundred fifty-five".