2105221445 has 8 divisors (see below), whose sum is σ = 2526687744. Its totient is φ = 1683895824.

The previous prime is 2105221403. The next prime is 2105221457. The reversal of 2105221445 is 5441225012.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2105221445 is a prime.

It is a Duffinian number.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 1172 + ... + 64898.

It is an arithmetic number, because the mean of its divisors is an integer number (315835968).

Almost surely, 2^2105221445 is an apocalyptic number.

It is an amenable number.

2105221445 is a deficient number, since it is larger than the sum of its proper divisors (421466299).

2105221445 is an equidigital number, since it uses as much as digits as its factorization.

2105221445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70339.

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 2105221445 is about 45882.6922161287. The cubic root of 2105221445 is about 1281.6396315852.

Adding to 2105221445 its reverse (5441225012), we get a palindrome (7546446457).

The spelling of 2105221445 in words is "two billion, one hundred five million, two hundred twenty-one thousand, four hundred forty-five".