2105439256 has 16 divisors (see below), whose sum is σ = 4179916440. Its totient is φ = 990794880.

The previous prime is 2105439253. The next prime is 2105439263. The reversal of 2105439256 is 6529345012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2105439253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7740450 + ... + 7740721.

Almost surely, 2^2105439256 is an apocalyptic number.

It is an amenable number.

2105439256 is a deficient number, since it is larger than the sum of its proper divisors (2074477184).

2105439256 is a wasteful number, since it uses less digits than its factorization.

2105439256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15481194 (or 15481190 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 37.

The square root of 2105439256 is about 45885.0657185974. The cubic root of 2105439256 is about 1281.6838305116.

The spelling of 2105439256 in words is "two billion, one hundred five million, four hundred thirty-nine thousand, two hundred fifty-six".