105521986 has 8 divisors (see below), whose sum is σ = 158350140. Its totient is φ = 52738608.

The previous prime is 105521951. The next prime is 105522007. The reversal of 105521986 is 689125501.

It can be written as a sum of positive squares in 2 ways, for example, as 95160025 + 10361961 = 9755^2 + 3219^2 .

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

It is a super-2 number, since 2×105521986² = 22269779058768392, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4501 + ... + 15208.

Almost surely, 2^105521986 is an apocalyptic number.

105521986 is a deficient number, since it is larger than the sum of its proper divisors (52828154).

105521986 is a wasteful number, since it uses less digits than its factorization.

105521986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22388.

The product of its (nonzero) digits is 21600, while the sum is 37.

The square root of 105521986 is about 10272.3894980671. The cubic root of 105521986 is about 472.5498744513.

The spelling of 105521986 in words is "one hundred five million, five hundred twenty-one thousand, nine hundred eighty-six".