2118430530251 has 32 divisors (see below), whose sum is σ = 2579715993600. Its totient is φ = 1698183691776.

The previous prime is 2118430530233. The next prime is 2118430530257. The reversal of 2118430530251 is 1520350348112.

It is a cyclic number.

It is not a de Polignac number, because 2118430530251 - 2⁶ = 2118430530187 is a prime.

It is a super-2 number, since 2×2118430530251² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2118430530257) 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 in 31 ways as a sum of consecutive naturals, for example, 18247550 + ... + 18363276.

It is an arithmetic number, because the mean of its divisors is an integer number (80616124800).

Almost surely, 2^{2118430530251} is an apocalyptic number.

2118430530251 is a deficient number, since it is larger than the sum of its proper divisors (461285463349).

2118430530251 is a wasteful number, since it uses less digits than its factorization.

2118430530251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116723.

The product of its (nonzero) digits is 28800, while the sum is 35.

Adding to 2118430530251 its reverse (1520350348112), we get a palindrome (3638780878363).

The spelling of 2118430530251 in words is "two trillion, one hundred eighteen billion, four hundred thirty million, five hundred thirty thousand, two hundred fifty-one".