2181442741 has 8 divisors (see below), whose sum is σ = 2223297720. Its totient is φ = 2139613632.

The previous prime is 2181442709. The next prime is 2181442793. The reversal of 2181442741 is 1472441812.

It can be written as a sum of positive squares in 4 ways, for example, as 430355025 + 1751087716 = 20745^2 + 41846^2 .

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 2181442741 - 2⁵ = 2181442709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2181442697 and 2181442706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2181442141) 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, 307551 + ... + 314563.

It is an arithmetic number, because the mean of its divisors is an integer number (277912215).

Almost surely, 2^2181442741 is an apocalyptic number.

It is an amenable number.

2181442741 is a deficient number, since it is larger than the sum of its proper divisors (41854979).

2181442741 is an equidigital number, since it uses as much as digits as its factorization.

2181442741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12935.

The product of its digits is 14336, while the sum is 34.

The square root of 2181442741 is about 46705.9176229308. The cubic root of 2181442741 is about 1296.9242356658.

The spelling of 2181442741 in words is "two billion, one hundred eighty-one million, four hundred forty-two thousand, seven hundred forty-one".