2211205745 has 16 divisors (see below), whose sum is σ = 3054334080. Its totient is φ = 1505343744.

The previous prime is 2211205709. The next prime is 2211205771. The reversal of 2211205745 is 5475021122.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2211205745 - 2⁶ = 2211205681 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 222392 + ... + 232121.

It is an arithmetic number, because the mean of its divisors is an integer number (190895880).

Almost surely, 2^2211205745 is an apocalyptic number.

It is an amenable number.

2211205745 is a deficient number, since it is larger than the sum of its proper divisors (843128335).

2211205745 is a wasteful number, since it uses less digits than its factorization.

2211205745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454664.

The product of its (nonzero) digits is 5600, while the sum is 29.

The square root of 2211205745 is about 47023.4595175642. The cubic root of 2211205745 is about 1302.7959046393.

Adding to 2211205745 its reverse (5475021122), we get a palindrome (7686226867).

The spelling of 2211205745 in words is "two billion, two hundred eleven million, two hundred five thousand, seven hundred forty-five".