2181241479 has 4 divisors (see below), whose sum is σ = 2908321976. Its totient is φ = 1454160984.

The previous prime is 2181241453. The next prime is 2181241537. The reversal of 2181241479 is 9741421812.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2181241479 - 2⁹ = 2181240967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2181201479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 363540244 + ... + 363540249.

It is an arithmetic number, because the mean of its divisors is an integer number (727080494).

Almost surely, 2^2181241479 is an apocalyptic number.

2181241479 is a deficient number, since it is larger than the sum of its proper divisors (727080497).

2181241479 is an equidigital number, since it uses as much as digits as its factorization.

2181241479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 727080496.

The product of its digits is 32256, while the sum is 39.

The square root of 2181241479 is about 46703.7630068499. The cubic root of 2181241479 is about 1296.8843492810.

The spelling of 2181241479 in words is "two billion, one hundred eighty-one million, two hundred forty-one thousand, four hundred seventy-nine".