2175802045 has 4 divisors (see below), whose sum is σ = 2610962460. Its totient is φ = 1740641632.

The previous prime is 2175802033. The next prime is 2175802073. The reversal of 2175802045 is 5402085712.

It is a happy number.

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 1302776836 + 873025209 = 36094^2 + 29547^2 .

It is a cyclic number.

It is not a de Polignac number, because 2175802045 - 2⁹ = 2175801533 is a prime.

It is a super-2 number, since 2×2175802045² = 9468229078052364050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2175802045.

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, 217580200 + ... + 217580209.

It is an arithmetic number, because the mean of its divisors is an integer number (652740615).

Almost surely, 2^2175802045 is an apocalyptic number.

It is an amenable number.

2175802045 is a deficient number, since it is larger than the sum of its proper divisors (435160415).

2175802045 is an equidigital number, since it uses as much as digits as its factorization.

2175802045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435160414.

The product of its (nonzero) digits is 22400, while the sum is 34.

The square root of 2175802045 is about 46645.4932978525. The cubic root of 2175802045 is about 1295.8054241383.

Adding to 2175802045 its reverse (5402085712), we get a palindrome (7577887757).

The spelling of 2175802045 in words is "two billion, one hundred seventy-five million, eight hundred two thousand, forty-five".