205533045 has 48 divisors (see below), whose sum is σ = 372415680. Its totient is φ = 108739584.

The previous prime is 205533023. The next prime is 205533059. The reversal of 205533045 is 540335502.

It is not a de Polignac number, because 205533045 - 2¹³ = 205524853 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 47 ways as a sum of consecutive naturals, for example, 168277 + ... + 169493.

It is an arithmetic number, because the mean of its divisors is an integer number (7758660).

Almost surely, 2^205533045 is an apocalyptic number.

It is an amenable number.

205533045 is a deficient number, since it is larger than the sum of its proper divisors (166882635).

205533045 is a wasteful number, since it uses less digits than its factorization.

205533045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1376 (or 1364 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 27.

The square root of 205533045 is about 14336.4237172316. The cubic root of 205533045 is about 590.1474734292.

Adding to 205533045 its reverse (540335502), we get a palindrome (745868547).

The spelling of 205533045 in words is "two hundred five million, five hundred thirty-three thousand, forty-five".