205145885 has 32 divisors (see below), whose sum is σ = 298909440. Its totient is φ = 131945472.

The previous prime is 205145873. The next prime is 205145911. The reversal of 205145885 is 588541502.

205145885 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 205145885 - 2¹⁰ = 205144861 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 331106 + ... + 331724.

It is an arithmetic number, because the mean of its divisors is an integer number (9340920).

Almost surely, 2^205145885 is an apocalyptic number.

It is an amenable number.

205145885 is a deficient number, since it is larger than the sum of its proper divisors (93763555).

205145885 is a wasteful number, since it uses less digits than its factorization.

205145885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1205.

The product of its (nonzero) digits is 64000, while the sum is 38.

The square root of 205145885 is about 14322.9146824241. The cubic root of 205145885 is about 589.7766894048.

The spelling of 205145885 in words is "two hundred five million, one hundred forty-five thousand, eight hundred eighty-five".