218030313 has 4 divisors (see below), whose sum is σ = 290707088. Its totient is φ = 145353540.

The previous prime is 218030273. The next prime is 218030327. The reversal of 218030313 is 313030812.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 218030313 - 2¹⁶ = 217964777 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 218030313.

It is not an unprimeable number, because it can be changed into a prime (218030353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36338383 + ... + 36338388.

It is an arithmetic number, because the mean of its divisors is an integer number (72676772).

Almost surely, 2^218030313 is an apocalyptic number.

It is an amenable number.

218030313 is a deficient number, since it is larger than the sum of its proper divisors (72676775).

218030313 is an equidigital number, since it uses as much as digits as its factorization.

218030313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72676774.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 218030313 is about 14765.8495522608. The cubic root of 218030313 is about 601.8740598496.

The spelling of 218030313 in words is "two hundred eighteen million, thirty thousand, three hundred thirteen".