2145454205 has 4 divisors (see below), whose sum is σ = 2574545052. Its totient is φ = 1716363360.

The previous prime is 2145454189. The next prime is 2145454211. The reversal of 2145454205 is 5024545412.

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 1186251364 + 959202841 = 34442^2 + 30971^2 .

It is not a de Polignac number, because 2145454205 - 2⁴ = 2145454189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 214545416 + ... + 214545425.

It is an arithmetic number, because the mean of its divisors is an integer number (643636263).

Almost surely, 2^2145454205 is an apocalyptic number.

It is an amenable number.

2145454205 is a deficient number, since it is larger than the sum of its proper divisors (429090847).

2145454205 is an equidigital number, since it uses as much as digits as its factorization.

2145454205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429090846.

The product of its (nonzero) digits is 32000, while the sum is 32.

The square root of 2145454205 is about 46319.0479716498. The cubic root of 2145454205 is about 1289.7526126573.

Adding to 2145454205 its reverse (5024545412), we get a palindrome (7169999617).

The spelling of 2145454205 in words is "two billion, one hundred forty-five million, four hundred fifty-four thousand, two hundred five".