2111522543 has 16 divisors (see below), whose sum is σ = 2293541376. Its totient is φ = 1932357600.

The previous prime is 2111522533. The next prime is 2111522551. The reversal of 2111522543 is 3452251112.

It is a cyclic number.

It is not a de Polignac number, because 2111522543 - 2⁴ = 2111522527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111522533) 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, 1614896 + ... + 1616202.

It is an arithmetic number, because the mean of its divisors is an integer number (143346336).

Almost surely, 2^2111522543 is an apocalyptic number.

2111522543 is a deficient number, since it is larger than the sum of its proper divisors (182018833).

2111522543 is a wasteful number, since it uses less digits than its factorization.

2111522543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2294.

The product of its digits is 2400, while the sum is 26.

The square root of 2111522543 is about 45951.3062164722. The cubic root of 2111522543 is about 1282.9170416487.

Adding to 2111522543 its reverse (3452251112), we get a palindrome (5563773655).

The spelling of 2111522543 in words is "two billion, one hundred eleven million, five hundred twenty-two thousand, five hundred forty-three".