2141644421 has 6 divisors (see below), whose sum is σ = 2491300710. Its totient is φ = 1835695176.

The previous prime is 2141644409. The next prime is 2141644423. The reversal of 2141644421 is 1244461412.

It can be written as a sum of positive squares in only one way, i.e., 1498464100 + 643180321 = 38710^2 + 25361^2 .

It is not a de Polignac number, because 2141644421 - 2⁶ = 2141644357 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 (2141644423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21853466 + ... + 21853563.

It is an arithmetic number, because the mean of its divisors is an integer number (415216785).

Almost surely, 2^2141644421 is an apocalyptic number.

It is an amenable number.

2141644421 is a deficient number, since it is larger than the sum of its proper divisors (349656289).

2141644421 is an equidigital number, since it uses as much as digits as its factorization.

2141644421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43707043 (or 43707036 counting only the distinct ones).

The product of its digits is 6144, while the sum is 29.

The square root of 2141644421 is about 46277.9042416573. The cubic root of 2141644421 is about 1288.9887355239.

The spelling of 2141644421 in words is "two billion, one hundred forty-one million, six hundred forty-four thousand, four hundred twenty-one".