2181346813 has 8 divisors (see below), whose sum is σ = 2297354400. Its totient is φ = 2065459248.

The previous prime is 2181346807. The next prime is 2181346859. The reversal of 2181346813 is 3186431812.

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

It is a cyclic number.

It is not a de Polignac number, because 2181346813 - 2²¹ = 2179249661 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 (2181344813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8595 + ... + 66607.

It is an arithmetic number, because the mean of its divisors is an integer number (287169300).

Almost surely, 2^2181346813 is an apocalyptic number.

It is an amenable number.

2181346813 is a deficient number, since it is larger than the sum of its proper divisors (116007587).

2181346813 is a wasteful number, since it uses less digits than its factorization.

2181346813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60011.

The product of its digits is 27648, while the sum is 37.

The square root of 2181346813 is about 46704.8906753886. The cubic root of 2181346813 is about 1296.9052248265.

The spelling of 2181346813 in words is "two billion, one hundred eighty-one million, three hundred forty-six thousand, eight hundred thirteen".