205130540 has 12 divisors (see below), whose sum is σ = 430774176. Its totient is φ = 82052208.

The previous prime is 205130509. The next prime is 205130561. The reversal of 205130540 is 45031502.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 10256527 = 205130540 / (2 + 0 + 5 + 1 + 3 + 0 + 5 + 4 + 0).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5128244 + ... + 5128283.

It is an arithmetic number, because the mean of its divisors is an integer number (35897848).

Almost surely, 2^205130540 is an apocalyptic number.

205130540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205130540 is an abundant number, since it is smaller than the sum of its proper divisors (225643636).

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

205130540 is a wasteful number, since it uses less digits than its factorization.

205130540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10256536 (or 10256534 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 205130540 is about 14322.3789923322. The cubic root of 205130540 is about 589.7619838552.

The spelling of 205130540 in words is "two hundred five million, one hundred thirty thousand, five hundred forty".