705632221 has 8 divisors (see below), whose sum is σ = 808205120. Its totient is φ = 603501408.

The previous prime is 705632171. The next prime is 705632237. The reversal of 705632221 is 122236507.

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

It is a cyclic number.

It is not a de Polignac number, because 705632221 - 2¹¹ = 705630173 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 705632221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (705630221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107091 + ... + 113488.

It is an arithmetic number, because the mean of its divisors is an integer number (101025640).

Almost surely, 2^705632221 is an apocalyptic number.

It is an amenable number.

705632221 is a deficient number, since it is larger than the sum of its proper divisors (102572899).

705632221 is a wasteful number, since it uses less digits than its factorization.

705632221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221043.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 705632221 is about 26563.7388369936. The cubic root of 705632221 is about 890.2790107002.

Adding to 705632221 its reverse (122236507), we get a palindrome (827868728).

The spelling of 705632221 in words is "seven hundred five million, six hundred thirty-two thousand, two hundred twenty-one".