818423225 has 6 divisors (see below), whose sum is σ = 1014844830. Its totient is φ = 654738560.

The previous prime is 818423201. The next prime is 818423251. The reversal of 818423225 is 522324818.

It can be written as a sum of positive squares in 3 ways, for example, as 103876864 + 714546361 = 10192^2 + 26731^2 .

It is not a de Polignac number, because 818423225 - 2¹⁰ = 818422201 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16368440 + ... + 16368489.

It is an arithmetic number, because the mean of its divisors is an integer number (169140805).

Almost surely, 2^818423225 is an apocalyptic number.

It is an amenable number.

818423225 is a deficient number, since it is larger than the sum of its proper divisors (196421605).

818423225 is a wasteful number, since it uses less digits than its factorization.

818423225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32736939 (or 32736934 counting only the distinct ones).

The product of its digits is 30720, while the sum is 35.

The square root of 818423225 is about 28608.0971929277. The cubic root of 818423225 is about 935.3898400108.

The spelling of 818423225 in words is "eight hundred eighteen million, four hundred twenty-three thousand, two hundred twenty-five".