205525221 has 8 divisors (see below), whose sum is σ = 298945824. Its totient is φ = 124560720.

The previous prime is 205525207. The next prime is 205525231. The reversal of 205525221 is 122525502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 205525221 - 2⁶ = 205525157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 205525191 and 205525200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205525231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3113986 + ... + 3114051.

It is an arithmetic number, because the mean of its divisors is an integer number (37368228).

Almost surely, 2^205525221 is an apocalyptic number.

It is an amenable number.

205525221 is a deficient number, since it is larger than the sum of its proper divisors (93420603).

205525221 is a wasteful number, since it uses less digits than its factorization.

205525221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6228051.

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 205525221 is about 14336.1508432354. The cubic root of 205525221 is about 590.1399849782.

The spelling of 205525221 in words is "two hundred five million, five hundred twenty-five thousand, two hundred twenty-one".