2105723481 has 8 divisors (see below), whose sum is σ = 2810836224. Its totient is φ = 1402213200.

The previous prime is 2105723441. The next prime is 2105723483. The reversal of 2105723481 is 1843275012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2105723481 - 2¹⁰ = 2105722457 is a prime.

It is a super-2 number, since 2×2105723481² = 8868142756869514722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2105723483) 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, 397545 + ... + 402806.

It is an arithmetic number, because the mean of its divisors is an integer number (351354528).

Almost surely, 2^2105723481 is an apocalyptic number.

It is an amenable number.

2105723481 is a deficient number, since it is larger than the sum of its proper divisors (705112743).

2105723481 is an equidigital number, since it uses as much as digits as its factorization.

2105723481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 801231.

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 2105723481 is about 45888.1627546800. The cubic root of 2105723481 is about 1281.7415018019.

Adding to 2105723481 its reverse (1843275012), we get a palindrome (3948998493).

The spelling of 2105723481 in words is "two billion, one hundred five million, seven hundred twenty-three thousand, four hundred eighty-one".