2115243405 has 48 divisors (see below), whose sum is σ = 4003758720. Its totient is φ = 1024540800.

The previous prime is 2115243391. The next prime is 2115243451. The reversal of 2115243405 is 5043425112.

2115243405 is a `hidden beast` number, since 2 + 1 + 15 + 243 + 405 = 666.

It is not a de Polignac number, because 2115243405 - 2⁵ = 2115243373 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 770335 + ... + 773075.

It is an arithmetic number, because the mean of its divisors is an integer number (83411640).

Almost surely, 2^2115243405 is an apocalyptic number.

It is an amenable number.

2115243405 is a deficient number, since it is larger than the sum of its proper divisors (1888515315).

2115243405 is a wasteful number, since it uses less digits than its factorization.

2115243405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4322 (or 4319 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 2115243405 is about 45991.7754060441. The cubic root of 2115243405 is about 1283.6701721464.

Adding to 2115243405 its reverse (5043425112), we get a palindrome (7158668517).

The spelling of 2115243405 in words is "two billion, one hundred fifteen million, two hundred forty-three thousand, four hundred five".