2105771438 has 4 divisors (see below), whose sum is σ = 3158657160. Its totient is φ = 1052885718.

The previous prime is 2105771413. The next prime is 2105771443. The reversal of 2105771438 is 8341775012.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 526442858 + ... + 526442861.

It is an arithmetic number, because the mean of its divisors is an integer number (789664290).

Almost surely, 2^2105771438 is an apocalyptic number.

2105771438 is a deficient number, since it is larger than the sum of its proper divisors (1052885722).

2105771438 is a wasteful number, since it uses less digits than its factorization.

2105771438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1052885721.

The product of its (nonzero) digits is 47040, while the sum is 38.

The square root of 2105771438 is about 45888.6852938717. The cubic root of 2105771438 is about 1281.7512321094.

The spelling of 2105771438 in words is "two billion, one hundred five million, seven hundred seventy-one thousand, four hundred thirty-eight".