2143521444 has 24 divisors (see below), whose sum is σ = 5136728128. Its totient is φ = 695196000.

The previous prime is 2143521439. The next prime is 2143521467. The reversal of 2143521444 is 4441253412.

It is a super-4 number, since 4×2143521444⁴ (a number of 38 digits) contains 4444 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2413432 + ... + 2414319.

Almost surely, 2^2143521444 is an apocalyptic number.

It is an amenable number.

2143521444 is an abundant number, since it is smaller than the sum of its proper divisors (2993206684).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2143521444 is a wasteful number, since it uses less digits than its factorization.

2143521444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4827795 (or 4827793 counting only the distinct ones).

The product of its digits is 15360, while the sum is 30.

The square root of 2143521444 is about 46298.1797050381. The cubic root of 2143521444 is about 1289.3651993580.

Adding to 2143521444 its reverse (4441253412), we get a palindrome (6584774856).

The spelling of 2143521444 in words is "two billion, one hundred forty-three million, five hundred twenty-one thousand, four hundred forty-four".