8218358253 has 60 divisors (see below), whose sum is σ = 14364933660. Its totient is φ = 4668668928.

The previous prime is 8218358251. The next prime is 8218358303. The reversal of 8218358253 is 3528538128.

8218358253 is a `hidden beast` number, since 8 + 2 + 18 + 3 + 582 + 53 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 4080909924 + 4137448329 = 63882^2 + 64323^2 .

It is not a de Polignac number, because 8218358253 - 2¹ = 8218358251 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8218358199 and 8218358208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8218358251) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 680653 + ... + 692621.

It is an arithmetic number, because the mean of its divisors is an integer number (239415561).

Almost surely, 2^8218358253 is an apocalyptic number.

It is an amenable number.

8218358253 is a deficient number, since it is larger than the sum of its proper divisors (6146575407).

8218358253 is a wasteful number, since it uses less digits than its factorization.

8218358253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12168 (or 12152 counting only the distinct ones).

The product of its digits is 460800, while the sum is 45.

The square root of 8218358253 is about 90655.1612044234. The cubic root of 8218358253 is about 2018.0334300704.

The spelling of 8218358253 in words is "eight billion, two hundred eighteen million, three hundred fifty-eight thousand, two hundred fifty-three".