2143520353 has 4 divisors (see below), whose sum is σ = 2308406548. Its totient is φ = 1978634160.

The previous prime is 2143520333. The next prime is 2143520383. The reversal of 2143520353 is 3530253412.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 383885649 + 1759634704 = 19593^2 + 41948^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2143520353 is a prime.

It is a super-4 number, since 4×2143520353⁴ (a number of 38 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2143520333) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 82443078 + ... + 82443103.

It is an arithmetic number, because the mean of its divisors is an integer number (577101637).

Almost surely, 2^2143520353 is an apocalyptic number.

It is an amenable number.

2143520353 is a deficient number, since it is larger than the sum of its proper divisors (164886195).

2143520353 is a wasteful number, since it uses less digits than its factorization.

2143520353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164886194.

The product of its (nonzero) digits is 10800, while the sum is 28.

The square root of 2143520353 is about 46298.1679227159. The cubic root of 2143520353 is about 1289.3649806061.

Adding to 2143520353 its reverse (3530253412), we get a palindrome (5673773765).

The spelling of 2143520353 in words is "two billion, one hundred forty-three million, five hundred twenty thousand, three hundred fifty-three".