205145270 has 32 divisors (see below), whose sum is σ = 408519936. Its totient is φ = 73544800.

The previous prime is 205145249. The next prime is 205145323. The reversal of 205145270 is 72541502.

205145270 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5324 + ... + 20943.

It is an arithmetic number, because the mean of its divisors is an integer number (12766248).

Almost surely, 2^205145270 is an apocalyptic number.

205145270 is a deficient number, since it is larger than the sum of its proper divisors (203374666).

205145270 is a wasteful number, since it uses less digits than its factorization.

205145270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26356.

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 205145270 is about 14322.8932133141. The cubic root of 205145270 is about 589.7761000469.

Adding to 205145270 its reverse (72541502), we get a palindrome (277686772).

The spelling of 205145270 in words is "two hundred five million, one hundred forty-five thousand, two hundred seventy".