2205724901 has 4 divisors (see below), whose sum is σ = 2206202592. Its totient is φ = 2205247212.

The previous prime is 2205724879. The next prime is 2205724907. The reversal of 2205724901 is 1094275022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1094275022 = 2 ⋅547137511.

It is a cyclic number.

It is not a de Polignac number, because 2205724901 - 2¹⁴ = 2205708517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2205724907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 231851 + ... + 241176.

It is an arithmetic number, because the mean of its divisors is an integer number (551550648).

Almost surely, 2^2205724901 is an apocalyptic number.

It is an amenable number.

2205724901 is a deficient number, since it is larger than the sum of its proper divisors (477691).

2205724901 is an equidigital number, since it uses as much as digits as its factorization.

2205724901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477690.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 2205724901 is about 46965.1455975599. The cubic root of 2205724901 is about 1301.7186147418.

Adding to 2205724901 its reverse (1094275022), we get a palindrome (3299999923).

The spelling of 2205724901 in words is "two billion, two hundred five million, seven hundred twenty-four thousand, nine hundred one".