2102788543 has 4 divisors (see below), whose sum is σ = 2107535688. Its totient is φ = 2098041400.

The previous prime is 2102788517. The next prime is 2102788549. The reversal of 2102788543 is 3458872012.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2102788543 - 2⁵ = 2102788511 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2102788496 and 2102788505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102788549) 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, 2372908 + ... + 2373793.

It is an arithmetic number, because the mean of its divisors is an integer number (526883922).

Almost surely, 2^2102788543 is an apocalyptic number.

2102788543 is a deficient number, since it is larger than the sum of its proper divisors (4747145).

2102788543 is an equidigital number, since it uses as much as digits as its factorization.

2102788543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4747144.

The product of its (nonzero) digits is 107520, while the sum is 40.

The square root of 2102788543 is about 45856.1723544388. The cubic root of 2102788543 is about 1281.1457317552.

The spelling of 2102788543 in words is "two billion, one hundred two million, seven hundred eighty-eight thousand, five hundred forty-three".