105721344 has 60 divisors (see below), whose sum is σ = 305132256. Its totient is φ = 35238912.

The previous prime is 105721307. The next prime is 105721349. The reversal of 105721344 is 443127501.

It is a super-2 number, since 2×105721344² = 22354005154332672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105721349) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6864 + ... + 16079.

Almost surely, 2^105721344 is an apocalyptic number.

It is an amenable number.

105721344 is an abundant number, since it is smaller than the sum of its proper divisors (199410912).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

105721344 is an equidigital number, since it uses as much as digits as its factorization.

105721344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22967 (or 22948 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 105721344 is about 10282.0885038012. The cubic root of 105721344 is about 472.8472764015.

Adding to 105721344 its reverse (443127501), we get a palindrome (548848845).

The spelling of 105721344 in words is "one hundred five million, seven hundred twenty-one thousand, three hundred forty-four".