2143503553 has 4 divisors (see below), whose sum is σ = 2144862640. Its totient is φ = 2142144468.

The previous prime is 2143503511. The next prime is 2143503559. The reversal of 2143503553 is 3553053412.

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 a de Polignac number, because none of the positive numbers 2^k-2143503553 is a prime.

It is a super-4 number, since 4×2143503553⁴ (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 (2143503559) 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, 677175 + ... + 680332.

It is an arithmetic number, because the mean of its divisors is an integer number (536215660).

Almost surely, 2^2143503553 is an apocalyptic number.

It is an amenable number.

2143503553 is a deficient number, since it is larger than the sum of its proper divisors (1359087).

2143503553 is a wasteful number, since it uses less digits than its factorization.

2143503553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1359086.

The product of its (nonzero) digits is 27000, while the sum is 31.

The square root of 2143503553 is about 46297.9864896952. The cubic root of 2143503553 is about 1289.3616120994.

Adding to 2143503553 its reverse (3553053412), we get a palindrome (5696556965).

The spelling of 2143503553 in words is "two billion, one hundred forty-three million, five hundred three thousand, five hundred fifty-three".