2543303643 has 16 divisors (see below), whose sum is σ = 3544780800. Its totient is φ = 1620066240.

The previous prime is 2543303639. The next prime is 2543303657. The reversal of 2543303643 is 3463033452.

It is a happy number.

It is not a de Polignac number, because 2543303643 - 2² = 2543303639 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2543303663) 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, 165738 + ... + 180431.

It is an arithmetic number, because the mean of its divisors is an integer number (221548800).

Almost surely, 2^2543303643 is an apocalyptic number.

2543303643 is a deficient number, since it is larger than the sum of its proper divisors (1001477157).

2543303643 is a wasteful number, since it uses less digits than its factorization.

2543303643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346282.

The product of its (nonzero) digits is 77760, while the sum is 33.

The square root of 2543303643 is about 50431.1772914335. The cubic root of 2543303643 is about 1365.0002715721. Note that the first 3 decimals are identical.

The spelling of 2543303643 in words is "two billion, five hundred forty-three million, three hundred three thousand, six hundred forty-three".