218113130947 has 4 divisors (see below), whose sum is σ = 219091216960. Its totient is φ = 217135044936.

The previous prime is 218113130933. The next prime is 218113131001. The reversal of 218113130947 is 749031311812.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-218113130947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (218113130047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 489042672 + ... + 489043117.

It is an arithmetic number, because the mean of its divisors is an integer number (54772804240).

Almost surely, 2^218113130947 is an apocalyptic number.

218113130947 is a deficient number, since it is larger than the sum of its proper divisors (978086013).

218113130947 is an equidigital number, since it uses as much as digits as its factorization.

218113130947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 978086012.

The product of its (nonzero) digits is 36288, while the sum is 40.

The spelling of 218113130947 in words is "two hundred eighteen billion, one hundred thirteen million, one hundred thirty thousand, nine hundred forty-seven".