105566621 has 8 divisors (see below), whose sum is σ = 107444064. Its totient is φ = 103703760.

The previous prime is 105566599. The next prime is 105566623. The reversal of 105566621 is 126665501.

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

It is a cyclic number.

It is not a de Polignac number, because 105566621 - 2²² = 101372317 is a prime.

It is a super-2 number, since 2×105566621² = 22288622938715282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105566623) 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, 11510 + ... + 18536.

It is an arithmetic number, because the mean of its divisors is an integer number (13430508).

Almost surely, 2^105566621 is an apocalyptic number.

It is an amenable number.

105566621 is a deficient number, since it is larger than the sum of its proper divisors (1877443).

105566621 is an equidigital number, since it uses as much as digits as its factorization.

105566621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7291.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 105566621 is about 10274.5618398061. The cubic root of 105566621 is about 472.6164933971.

It can be divided in two parts, 1055 and 66621, that added together give a palindrome (67676).

The spelling of 105566621 in words is "one hundred five million, five hundred sixty-six thousand, six hundred twenty-one".