918718022231 has 2 divisors, whose sum is σ = 918718022232. Its totient is φ = 918718022230.

The previous prime is 918718022221. The next prime is 918718022279. The reversal of 918718022231 is 132220817819.

It is a weak prime.

It is an emirp because it is prime and its reverse (132220817819) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-918718022231 is a prime.

It is a super-2 number, since 2×918718022231² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (918718022221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 459359011115 + 459359011116.

It is an arithmetic number, because the mean of its divisors is an integer number (459359011116).

Almost surely, 2^918718022231 is an apocalyptic number.

918718022231 is a deficient number, since it is larger than the sum of its proper divisors (1).

918718022231 is an equidigital number, since it uses as much as digits as its factorization.

918718022231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 44.

The spelling of 918718022231 in words is "nine hundred eighteen billion, seven hundred eighteen million, twenty-two thousand, two hundred thirty-one".