2181346479 has 48 divisors (see below), whose sum is σ = 3448448640. Its totient is φ = 1320675840.

The previous prime is 2181346451. The next prime is 2181346481. The reversal of 2181346479 is 9746431812.

2181346479 is a `hidden beast` number, since 2 + 181 + 3 + 464 + 7 + 9 = 666.

It is not a de Polignac number, because 2181346479 - 2⁷ = 2181346351 is a prime.

It is a super-2 number, since 2×2181346479² = 9516544922891394882, which contains 22 as substring.

Its product of digits (290304) is a multiple of the sum of its prime factors (1152).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2181346439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2821537 + ... + 2822309.

It is an arithmetic number, because the mean of its divisors is an integer number (71842680).

Almost surely, 2^2181346479 is an apocalyptic number.

2181346479 is a deficient number, since it is larger than the sum of its proper divisors (1267102161).

2181346479 is a wasteful number, since it uses less digits than its factorization.

2181346479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1152 (or 1149 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 2181346479 is about 46704.8870997458. The cubic root of 2181346479 is about 1296.9051586340.

The spelling of 2181346479 in words is "two billion, one hundred eighty-one million, three hundred forty-six thousand, four hundred seventy-nine".