2118257305 has 8 divisors (see below), whose sum is σ = 2542215744. Its totient is φ = 1694401200.

The previous prime is 2118257263. The next prime is 2118257347. The reversal of 2118257305 is 5037528112.

It is an interprime number because it is at equal distance from previous prime (2118257263) and next prime (2118257347).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2118257305 - 2⁷ = 2118257177 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31570 + ... + 72340.

It is an arithmetic number, because the mean of its divisors is an integer number (317776968).

Almost surely, 2^2118257305 is an apocalyptic number.

It is an amenable number.

2118257305 is a deficient number, since it is larger than the sum of its proper divisors (423958439).

2118257305 is a wasteful number, since it uses less digits than its factorization.

2118257305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51167.

The product of its (nonzero) digits is 16800, while the sum is 34.

The square root of 2118257305 is about 46024.5293837971. The cubic root of 2118257305 is about 1284.2795610339.

It can be divided in two parts, 21182 and 57305, that added together give a palindrome (78487).

The spelling of 2118257305 in words is "two billion, one hundred eighteen million, two hundred fifty-seven thousand, three hundred five".