2143203553 has 4 divisors (see below), whose sum is σ = 2256003760. Its totient is φ = 2030403348.

The previous prime is 2143203547. The next prime is 2143203611. The reversal of 2143203553 is 3553023412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2143203553 - 2⁵ = 2143203521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2143203253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56400075 + ... + 56400112.

It is an arithmetic number, because the mean of its divisors is an integer number (564000940).

Almost surely, 2^2143203553 is an apocalyptic number.

It is an amenable number.

2143203553 is a deficient number, since it is larger than the sum of its proper divisors (112800207).

2143203553 is a wasteful number, since it uses less digits than its factorization.

2143203553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112800206.

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

The square root of 2143203553 is about 46294.7464946078. The cubic root of 2143203553 is about 1289.3014572297.

Adding to 2143203553 its reverse (3553023412), we get a palindrome (5696226965).

The spelling of 2143203553 in words is "two billion, one hundred forty-three million, two hundred three thousand, five hundred fifty-three".