2105211523 has 4 divisors (see below), whose sum is σ = 2105564248. Its totient is φ = 2104858800.

The previous prime is 2105211499. The next prime is 2105211553. The reversal of 2105211523 is 3251125012.

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

It is a cyclic number.

It is not a de Polignac number, because 2105211523 - 2⁵ = 2105211491 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2105211494 and 2105211503.

It is not an unprimeable number, because it can be changed into a prime (2105211553) 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, 167253 + ... + 179398.

It is an arithmetic number, because the mean of its divisors is an integer number (526391062).

Almost surely, 2^2105211523 is an apocalyptic number.

2105211523 is a deficient number, since it is larger than the sum of its proper divisors (352725).

2105211523 is an equidigital number, since it uses as much as digits as its factorization.

2105211523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352724.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 2105211523 is about 45882.5840924419. The cubic root of 2105211523 is about 1281.6376181077.

Adding to 2105211523 its reverse (3251125012), we get a palindrome (5356336535).

The spelling of 2105211523 in words is "two billion, one hundred five million, two hundred eleven thousand, five hundred twenty-three".