205045240 has 16 divisors (see below), whose sum is σ = 461351880. Its totient is φ = 82018080.

The previous prime is 205045229. The next prime is 205045249. The reversal of 205045240 is 42540502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205045249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2563026 + ... + 2563105.

Almost surely, 2^205045240 is an apocalyptic number.

205045240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205045240 is an abundant number, since it is smaller than the sum of its proper divisors (256306640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

205045240 is a wasteful number, since it uses less digits than its factorization.

205045240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5126142 (or 5126138 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 205045240 is about 14319.4008254536. The cubic root of 205045240 is about 589.6802250690.

Adding to 205045240 its reverse (42540502), we get a palindrome (247585742).

The spelling of 205045240 in words is "two hundred five million, forty-five thousand, two hundred forty".