2229720745 has 12 divisors (see below), whose sum is σ = 3112508484. Its totient is φ = 1528951200.

The previous prime is 2229720643. The next prime is 2229720769. The reversal of 2229720745 is 5470279222.

It is a happy number.

2229720745 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1525136809 + 704583936 = 39053^2 + 26544^2 .

It is not a de Polignac number, because 2229720745 - 2¹¹ = 2229718697 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2229720698 and 2229720707.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4550206 + ... + 4550695.

It is an arithmetic number, because the mean of its divisors is an integer number (259375707).

Almost surely, 2^2229720745 is an apocalyptic number.

It is an amenable number.

2229720745 is a deficient number, since it is larger than the sum of its proper divisors (882787739).

2229720745 is an equidigital number, since it uses as much as digits as its factorization.

2229720745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9100920 (or 9100913 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 40.

The square root of 2229720745 is about 47219.9189431748. The cubic root of 2229720745 is about 1306.4220187523.

Adding to 2229720745 its reverse (5470279222), we get a palindrome (7699999967).

The spelling of 2229720745 in words is "two billion, two hundred twenty-nine million, seven hundred twenty thousand, seven hundred forty-five".