105430221 has 32 divisors (see below), whose sum is σ = 177072000. Its totient is φ = 61461504.

The previous prime is 105430211. The next prime is 105430223. The reversal of 105430221 is 122034501.

105430221 is a `hidden beast` number, since 10 + 5 + 430 + 221 = 666.

It is not a de Polignac number, because 105430221 - 2⁵ = 105430189 is a prime.

It is a super-2 number, since 2×105430221² = 22231063000217682, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 105430194 and 105430203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105430223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1236 + ... + 14573.

It is an arithmetic number, because the mean of its divisors is an integer number (5533500).

Almost surely, 2^105430221 is an apocalyptic number.

It is an amenable number.

105430221 is a deficient number, since it is larger than the sum of its proper divisors (71641779).

105430221 is a wasteful number, since it uses less digits than its factorization.

105430221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15850 (or 15844 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 105430221 is about 10267.9219416589. The cubic root of 105430221 is about 472.4128536685.

Adding to 105430221 its reverse (122034501), we get a palindrome (227464722).

The spelling of 105430221 in words is "one hundred five million, four hundred thirty thousand, two hundred twenty-one".