215430105 has 16 divisors (see below), whose sum is σ = 376023744. Its totient is φ = 104450880.

The previous prime is 215430097. The next prime is 215430133. The reversal of 215430105 is 501034512.

It is not a de Polignac number, because 215430105 - 2³ = 215430097 is a prime.

It is a super-2 number, since 2×215430105² = 92820260280622050, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 652654 + ... + 652983.

It is an arithmetic number, because the mean of its divisors is an integer number (23501484).

Almost surely, 2^215430105 is an apocalyptic number.

It is an amenable number.

215430105 is a deficient number, since it is larger than the sum of its proper divisors (160593639).

215430105 is a wasteful number, since it uses less digits than its factorization.

215430105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1305656.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 215430105 is about 14677.5374296917. The cubic root of 215430105 is about 599.4718546851.

Adding to 215430105 its reverse (501034512), we get a palindrome (716464617).

The spelling of 215430105 in words is "two hundred fifteen million, four hundred thirty thousand, one hundred five".