105521408 has 18 divisors (see below), whose sum is σ = 210631134. Its totient is φ = 52760576.

The previous prime is 105521393. The next prime is 105521443. The reversal of 105521408 is 804125501.

It can be written as a sum of positive squares in only one way, i.e., 102252544 + 3268864 = 10112^2 + 1808^2 .

It is a super-2 number, since 2×105521408² = 22269535092604928, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 205841 + ... + 206352.

Almost surely, 2^105521408 is an apocalyptic number.

It is an amenable number.

105521408 is a deficient number, since it is larger than the sum of its proper divisors (105109726).

105521408 is an frugal number, since it uses more digits than its factorization.

105521408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412209 (or 412195 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 26.

The square root of 105521408 is about 10272.3613643602. The cubic root of 105521408 is about 472.5490116474.

Adding to 105521408 its reverse (804125501), we get a palindrome (909646909).

The spelling of 105521408 in words is "one hundred five million, five hundred twenty-one thousand, four hundred eight".