205701221 has 8 divisors (see below), whose sum is σ = 225410304. Its totient is φ = 186160320.

The previous prime is 205701191. The next prime is 205701247. The reversal of 205701221 is 122107502.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205701221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 205701193 and 205701202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205701521) 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, 39476 + ... + 44381.

It is an arithmetic number, because the mean of its divisors is an integer number (28176288).

Almost surely, 2^205701221 is an apocalyptic number.

It is an amenable number.

205701221 is a deficient number, since it is larger than the sum of its proper divisors (19709083).

205701221 is a wasteful number, since it uses less digits than its factorization.

205701221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84091.

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 205701221 is about 14342.2878579395. The cubic root of 205701221 is about 590.3083909173.

Adding to 205701221 its reverse (122107502), we get a palindrome (327808723).

The spelling of 205701221 in words is "two hundred five million, seven hundred one thousand, two hundred twenty-one".