215320105 has 48 divisors (see below), whose sum is σ = 349638912. Its totient is φ = 123868800.

The previous prime is 215320097. The next prime is 215320123. The reversal of 215320105 is 501023512.

It is not a de Polignac number, because 215320105 - 2³ = 215320097 is a prime.

It is a super-2 number, since 2×215320105² = 92725495234422050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 53100 + ... + 57010.

It is an arithmetic number, because the mean of its divisors is an integer number (7284144).

Almost surely, 2^215320105 is an apocalyptic number.

It is an amenable number.

215320105 is a deficient number, since it is larger than the sum of its proper divisors (134318807).

215320105 is a wasteful number, since it uses less digits than its factorization.

215320105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3958 (or 3947 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 215320105 is about 14673.7897286284. The cubic root of 215320105 is about 599.3698059167.

Adding to 215320105 its reverse (501023512), we get a palindrome (716343617).

The spelling of 215320105 in words is "two hundred fifteen million, three hundred twenty thousand, one hundred five".