105688221 has 8 divisors (see below), whose sum is σ = 140965344. Its totient is φ = 70434960.

The previous prime is 105688213. The next prime is 105688237. The reversal of 105688221 is 122886501.

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

It is not a de Polignac number, because 105688221 - 2³ = 105688213 is a prime.

It is a super-2 number, since 2×105688221² = 22340000116289682, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105688211) 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, 12870 + ... + 19416.

It is an arithmetic number, because the mean of its divisors is an integer number (17620668).

Almost surely, 2^105688221 is an apocalyptic number.

It is an amenable number.

105688221 is a deficient number, since it is larger than the sum of its proper divisors (35277123).

105688221 is an equidigital number, since it uses as much as digits as its factorization.

105688221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11931.

The product of its (nonzero) digits is 7680, while the sum is 33.

The square root of 105688221 is about 10280.4776639999. The cubic root of 105688221 is about 472.7978894764.

The spelling of 105688221 in words is "one hundred five million, six hundred eighty-eight thousand, two hundred twenty-one".