2245440161 has 4 divisors (see below), whose sum is σ = 2249227332. Its totient is φ = 2241652992.

The previous prime is 2245440151. The next prime is 2245440163. The reversal of 2245440161 is 1610445422.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1790897761 + 454542400 = 42319^2 + 21320^2 .

It is a cyclic number.

It is not a de Polignac number, because 2245440161 - 2²⁶ = 2178331297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2245440163) 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, 1892696 + ... + 1893881.

It is an arithmetic number, because the mean of its divisors is an integer number (562306833).

Almost surely, 2^2245440161 is an apocalyptic number.

It is an amenable number.

2245440161 is a deficient number, since it is larger than the sum of its proper divisors (3787171).

2245440161 is an equidigital number, since it uses as much as digits as its factorization.

2245440161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3787170.

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 2245440161 is about 47386.0756024383. The cubic root of 2245440161 is about 1309.4849015022.

Adding to 2245440161 its reverse (1610445422), we get a palindrome (3855885583).

The spelling of 2245440161 in words is "two billion, two hundred forty-five million, four hundred forty thousand, one hundred sixty-one".