2105140405 has 32 divisors (see below), whose sum is σ = 2644992000. Its totient is φ = 1606651200.

The previous prime is 2105140381. The next prime is 2105140409. The reversal of 2105140405 is 5040415012.

It is not a de Polignac number, because 2105140405 - 2²⁷ = 1970922677 is a prime.

It is a super-2 number, since 2×2105140405² = 8863232249527128050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2105140409) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4287210 + ... + 4287700.

It is an arithmetic number, because the mean of its divisors is an integer number (82656000).

Almost surely, 2^2105140405 is an apocalyptic number.

It is an amenable number.

2105140405 is a deficient number, since it is larger than the sum of its proper divisors (539851595).

2105140405 is a wasteful number, since it uses less digits than its factorization.

2105140405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 865.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 2105140405 is about 45881.8090859548. The cubic root of 2105140405 is about 1281.6231859030.

Adding to 2105140405 its reverse (5040415012), we get a palindrome (7145555417).

The spelling of 2105140405 in words is "two billion, one hundred five million, one hundred forty thousand, four hundred five".