2105671305 has 8 divisors (see below), whose sum is σ = 3369074112. Its totient is φ = 1123024688.

The previous prime is 2105671279. The next prime is 2105671307. The reversal of 2105671305 is 5031765012.

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 2105671305 - 2⁵ = 2105671273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2105671307) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70189029 + ... + 70189058.

It is an arithmetic number, because the mean of its divisors is an integer number (421134264).

Almost surely, 2^2105671305 is an apocalyptic number.

It is an amenable number.

2105671305 is a deficient number, since it is larger than the sum of its proper divisors (1263402807).

2105671305 is a wasteful number, since it uses less digits than its factorization.

2105671305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140378095.

The product of its (nonzero) digits is 6300, while the sum is 30.

The square root of 2105671305 is about 45887.5942385303. The cubic root of 2105671305 is about 1281.7309153063.

The spelling of 2105671305 in words is "two billion, one hundred five million, six hundred seventy-one thousand, three hundred five".