205530215 has 16 divisors (see below), whose sum is σ = 269580960. Its totient is φ = 149185920.

The previous prime is 205530203. The next prime is 205530229. The reversal of 205530215 is 512035502.

It is not a de Polignac number, because 205530215 - 2⁶ = 205530151 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27281 + ... + 33989.

It is an arithmetic number, because the mean of its divisors is an integer number (16848810).

Almost surely, 2^205530215 is an apocalyptic number.

205530215 is a deficient number, since it is larger than the sum of its proper divisors (64050745).

205530215 is a wasteful number, since it uses less digits than its factorization.

205530215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7282.

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 205530215 is about 14336.3250172420. The cubic root of 205530215 is about 590.1447648217.

Adding to 205530215 its reverse (512035502), we get a palindrome (717565717).

The spelling of 205530215 in words is "two hundred five million, five hundred thirty thousand, two hundred fifteen".