2112543505 has 8 divisors (see below), whose sum is σ = 2684173032. Its totient is φ = 1590620928.

The previous prime is 2112543463. The next prime is 2112543533. The reversal of 2112543505 is 5053452112.

It can be written as a sum of positive squares in 4 ways, for example, as 710115904 + 1402427601 = 26648^2 + 37449^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2112543505 - 2²¹ = 2110446353 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12426642 + ... + 12426811.

It is an arithmetic number, because the mean of its divisors is an integer number (335521629).

Almost surely, 2^2112543505 is an apocalyptic number.

It is an amenable number.

2112543505 is a deficient number, since it is larger than the sum of its proper divisors (571629527).

2112543505 is a wasteful number, since it uses less digits than its factorization.

2112543505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24853475.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 2112543505 is about 45962.4140466969. The cubic root of 2112543505 is about 1283.1237800681.

Adding to 2112543505 its reverse (5053452112), we get a palindrome (7165995617).

The spelling of 2112543505 in words is "two billion, one hundred twelve million, five hundred forty-three thousand, five hundred five".