2105255545 has 4 divisors (see below), whose sum is σ = 2526306660. Its totient is φ = 1684204432.

The previous prime is 2105255531. The next prime is 2105255549. The reversal of 2105255545 is 5455525012.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1092170304 + 1013085241 = 33048^2 + 31829^2 .

It is a cyclic number.

It is not a de Polignac number, because 2105255545 - 2²⁵ = 2071701113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2105255545.

It is not an unprimeable number, because it can be changed into a prime (2105255549) 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, 210525550 + ... + 210525559.

It is an arithmetic number, because the mean of its divisors is an integer number (631576665).

Almost surely, 2^2105255545 is an apocalyptic number.

It is an amenable number.

2105255545 is a deficient number, since it is larger than the sum of its proper divisors (421051115).

2105255545 is an equidigital number, since it uses as much as digits as its factorization.

2105255545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421051114.

The product of its (nonzero) digits is 50000, while the sum is 34.

The square root of 2105255545 is about 45883.0638144403. The cubic root of 2105255545 is about 1281.6465514710.

The spelling of 2105255545 in words is "two billion, one hundred five million, two hundred fifty-five thousand, five hundred forty-five".