2143041521 has 16 divisors (see below), whose sum is σ = 2284200000. Its totient is φ = 2004883776.

The previous prime is 2143041503. The next prime is 2143041541. The reversal of 2143041521 is 1251403412.

It is a cyclic number.

It is not a de Polignac number, because 2143041521 - 2⁶ = 2143041457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2143041541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 504635 + ... + 508863.

It is an arithmetic number, because the mean of its divisors is an integer number (142762500).

Almost surely, 2^2143041521 is an apocalyptic number.

It is an amenable number.

2143041521 is a deficient number, since it is larger than the sum of its proper divisors (141158479).

2143041521 is a wasteful number, since it uses less digits than its factorization.

2143041521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4576.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 2143041521 is about 46292.9964573476. The cubic root of 2143041521 is about 1289.2689648488.

Adding to 2143041521 its reverse (1251403412), we get a palindrome (3394444933).

The spelling of 2143041521 in words is "two billion, one hundred forty-three million, forty-one thousand, five hundred twenty-one".