2105405135 has 4 divisors (see below), whose sum is σ = 2526486168. Its totient is φ = 1684324104.

The previous prime is 2105405129. The next prime is 2105405149. The reversal of 2105405135 is 5315045012.

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 2105405135 - 2⁸ = 2105404879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210540509 + ... + 210540518.

It is an arithmetic number, because the mean of its divisors is an integer number (631621542).

Almost surely, 2^2105405135 is an apocalyptic number.

2105405135 is a deficient number, since it is larger than the sum of its proper divisors (421081033).

2105405135 is an equidigital number, since it uses as much as digits as its factorization.

2105405135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421081032.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 2105405135 is about 45884.6939076638. The cubic root of 2105405135 is about 1281.6769067672.

The spelling of 2105405135 in words is "two billion, one hundred five million, four hundred five thousand, one hundred thirty-five".