2405221905 has 32 divisors (see below), whose sum is σ = 3870002304. Its totient is φ = 1275595776.

The previous prime is 2405221901. The next prime is 2405221919. The reversal of 2405221905 is 5091225042.

It is not a de Polignac number, because 2405221905 - 2² = 2405221901 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2405221901) 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, 3552427 + ... + 3553103.

It is an arithmetic number, because the mean of its divisors is an integer number (120937572).

Almost surely, 2^2405221905 is an apocalyptic number.

It is an amenable number.

2405221905 is a deficient number, since it is larger than the sum of its proper divisors (1464780399).

2405221905 is a wasteful number, since it uses less digits than its factorization.

2405221905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1665.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 2405221905 is about 49043.0617416980. The cubic root of 2405221905 is about 1339.8362287785.

Adding to 2405221905 its reverse (5091225042), we get a palindrome (7496446947).

The spelling of 2405221905 in words is "two billion, four hundred five million, two hundred twenty-one thousand, nine hundred five".