205349945 has 4 divisors (see below), whose sum is σ = 246419940. Its totient is φ = 164279952.

The previous prime is 205349933. The next prime is 205349951. The reversal of 205349945 is 549943502.

205349945 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 117440569 + 87909376 = 10837^2 + 9376^2 .

It is a cyclic number.

It is not a de Polignac number, because 205349945 - 2¹⁰ = 205348921 is a prime.

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, 20534990 + ... + 20534999.

It is an arithmetic number, because the mean of its divisors is an integer number (61604985).

Almost surely, 2^205349945 is an apocalyptic number.

It is an amenable number.

205349945 is a deficient number, since it is larger than the sum of its proper divisors (41069995).

205349945 is an equidigital number, since it uses as much as digits as its factorization.

205349945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41069994.

The product of its (nonzero) digits is 194400, while the sum is 41.

The square root of 205349945 is about 14330.0364619215. The cubic root of 205349945 is about 589.9721762231.

The spelling of 205349945 in words is "two hundred five million, three hundred forty-nine thousand, nine hundred forty-five".