2181234853 has 12 divisors (see below), whose sum is σ = 2542428000. Its totient is φ = 1865891832.

The previous prime is 2181234851. The next prime is 2181234863. The reversal of 2181234853 is 3584321812.

It is not a de Polignac number, because 2181234853 - 2¹ = 2181234851 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2181234851) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19603 + ... + 68896.

It is an arithmetic number, because the mean of its divisors is an integer number (211869000).

Almost surely, 2^2181234853 is an apocalyptic number.

It is an amenable number.

2181234853 is a deficient number, since it is larger than the sum of its proper divisors (361193147).

2181234853 is an equidigital number, since it uses as much as digits as its factorization.

2181234853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89016 (or 89009 counting only the distinct ones).

The product of its digits is 46080, while the sum is 37.

The square root of 2181234853 is about 46703.6920703278. The cubic root of 2181234853 is about 1296.8830360894.

It can be divided in two parts, 21812 and 34853, that added together give a palindrome (56665).

The spelling of 2181234853 in words is "two billion, one hundred eighty-one million, two hundred thirty-four thousand, eight hundred fifty-three".