205540424 has 32 divisors (see below), whose sum is σ = 393336000. Its totient is φ = 100663872.

The previous prime is 205540403. The next prime is 205540457. The reversal of 205540424 is 424045502.

It is a junction number, because it is equal to n+sod(n) for n = 205540393 and 205540402.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168842 + ... + 170054.

It is an arithmetic number, because the mean of its divisors is an integer number (12291750).

Almost surely, 2^205540424 is an apocalyptic number.

It is an amenable number.

205540424 is a deficient number, since it is larger than the sum of its proper divisors (187795576).

205540424 is a wasteful number, since it uses less digits than its factorization.

205540424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1637 (or 1633 counting only the distinct ones).

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

The square root of 205540424 is about 14336.6810664114. The cubic root of 205540424 is about 590.1545357909.

Adding to 205540424 its reverse (424045502), we get a palindrome (629585926).

The spelling of 205540424 in words is "two hundred five million, five hundred forty thousand, four hundred twenty-four".