2320722161 has 4 divisors (see below), whose sum is σ = 2342013300. Its totient is φ = 2299431024.

The previous prime is 2320722133. The next prime is 2320722163. The reversal of 2320722161 is 1612270232.

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 1768707136 + 552015025 = 42056^2 + 23495^2 .

It is a cyclic number.

It is not a de Polignac number, because 2320722161 - 2⁶ = 2320722097 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2320722161.

It is not an unprimeable number, because it can be changed into a prime (2320722163) 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, 10645406 + ... + 10645623.

It is an arithmetic number, because the mean of its divisors is an integer number (585503325).

Almost surely, 2^2320722161 is an apocalyptic number.

It is an amenable number.

2320722161 is a deficient number, since it is larger than the sum of its proper divisors (21291139).

2320722161 is a wasteful number, since it uses less digits than its factorization.

2320722161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21291138.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 2320722161 is about 48173.8742577343. The cubic root of 2320722161 is about 1323.9585334065.

Adding to 2320722161 its reverse (1612270232), we get a palindrome (3932992393).

The spelling of 2320722161 in words is "two billion, three hundred twenty million, seven hundred twenty-two thousand, one hundred sixty-one".