205041145 has 4 divisors (see below), whose sum is σ = 246049380. Its totient is φ = 164032912.

The previous prime is 205041139. The next prime is 205041163. The reversal of 205041145 is 541140502.

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 109998144 + 95043001 = 10488^2 + 9749^2 .

It is a cyclic number.

It is not a de Polignac number, because 205041145 - 2¹⁷ = 204910073 is a prime.

It is a super-2 number, since 2×205041145² = 84083742285822050, which contains 22 as substring.

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, 20504110 + ... + 20504119.

It is an arithmetic number, because the mean of its divisors is an integer number (61512345).

Almost surely, 2^205041145 is an apocalyptic number.

It is an amenable number.

205041145 is a deficient number, since it is larger than the sum of its proper divisors (41008235).

205041145 is an equidigital number, since it uses as much as digits as its factorization.

205041145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41008234.

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

The square root of 205041145 is about 14319.2578369132. The cubic root of 205041145 is about 589.6762995018.

Adding to 205041145 its reverse (541140502), we get a palindrome (746181647).

The spelling of 205041145 in words is "two hundred five million, forty-one thousand, one hundred forty-five".