205244540 has 12 divisors (see below), whose sum is σ = 431013576. Its totient is φ = 82097808.

The previous prime is 205244527. The next prime is 205244549. The reversal of 205244540 is 45442502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205244549) 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, 5131094 + ... + 5131133.

It is an arithmetic number, because the mean of its divisors is an integer number (35917798).

Almost surely, 2^205244540 is an apocalyptic number.

205244540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205244540 is an abundant number, since it is smaller than the sum of its proper divisors (225769036).

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

205244540 is a wasteful number, since it uses less digits than its factorization.

205244540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10262236 (or 10262234 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 26.

The square root of 205244540 is about 14326.3582253132. The cubic root of 205244540 is about 589.8712157867.

The spelling of 205244540 in words is "two hundred five million, two hundred forty-four thousand, five hundred forty".