818316242 has 4 divisors (see below), whose sum is σ = 1227474366. Its totient is φ = 409158120.

The previous prime is 818316227. The next prime is 818316283. The reversal of 818316242 is 242613818.

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

It can be written as a sum of positive squares in only one way, i.e., 740329681 + 77986561 = 27209^2 + 8831^2 .

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 as a sum of consecutive naturals, namely, 204579059 + ... + 204579062.

Almost surely, 2^818316242 is an apocalyptic number.

818316242 is a deficient number, since it is larger than the sum of its proper divisors (409158124).

818316242 is a wasteful number, since it uses less digits than its factorization.

818316242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409158123.

The product of its digits is 18432, while the sum is 35.

The square root of 818316242 is about 28606.2273290275. The cubic root of 818316242 is about 935.3490806706.

The spelling of 818316242 in words is "eight hundred eighteen million, three hundred sixteen thousand, two hundred forty-two".