105756221 has 8 divisors (see below), whose sum is σ = 111707904. Its totient is φ = 99963360.

The previous prime is 105756199. The next prime is 105756229. The reversal of 105756221 is 122657501.

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-105756221 is a prime.

It is a super-2 number, since 2×105756221² = 22368756560401682, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105756229) 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, 38336 + ... + 41001.

It is an arithmetic number, because the mean of its divisors is an integer number (13963488).

Almost surely, 2^105756221 is an apocalyptic number.

It is an amenable number.

105756221 is a deficient number, since it is larger than the sum of its proper divisors (5951683).

105756221 is an equidigital number, since it uses as much as digits as its factorization.

105756221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79411.

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 105756221 is about 10283.7843715239. The cubic root of 105756221 is about 472.8992674208.

The spelling of 105756221 in words is "one hundred five million, seven hundred fifty-six thousand, two hundred twenty-one".