205533345 has 16 divisors (see below), whose sum is σ = 329519232. Its totient is φ = 109395840.

The previous prime is 205533337. The next prime is 205533373. The reversal of 205533345 is 543335502.

It is not a de Polignac number, because 205533345 - 2³ = 205533337 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6076 + ... + 21165.

It is an arithmetic number, because the mean of its divisors is an integer number (20594952).

Almost surely, 2^205533345 is an apocalyptic number.

It is an amenable number.

205533345 is a deficient number, since it is larger than the sum of its proper divisors (123985887).

205533345 is a wasteful number, since it uses less digits than its factorization.

205533345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27752.

The product of its (nonzero) digits is 27000, while the sum is 30.

The square root of 205533345 is about 14336.4341800882. The cubic root of 205533345 is about 590.1477605593.

Adding to 205533345 its reverse (543335502), we get a palindrome (748868847).

It can be divided in two parts, 2055333 and 45, that added together give a triangular number (2055378 = T₂₀₂₇).

The spelling of 205533345 in words is "two hundred five million, five hundred thirty-three thousand, three hundred forty-five".