2208320761 has 2 divisors, whose sum is σ = 2208320762. Its totient is φ = 2208320760.

The previous prime is 2208320759. The next prime is 2208320789. The reversal of 2208320761 is 1670238022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1840410000 + 367910761 = 42900^2 + 19181^2 .

It is a cyclic number.

It is not a de Polignac number, because 2208320761 - 2¹ = 2208320759 is a prime.

Together with 2208320759, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2208320701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1104160380 + 1104160381.

It is an arithmetic number, because the mean of its divisors is an integer number (1104160381).

Almost surely, 2^2208320761 is an apocalyptic number.

It is an amenable number.

2208320761 is a deficient number, since it is larger than the sum of its proper divisors (1).

2208320761 is an equidigital number, since it uses as much as digits as its factorization.

2208320761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 2208320761 is about 46992.7734976347. The cubic root of 2208320761 is about 1302.2290674225.

Adding to 2208320761 its reverse (1670238022), we get a palindrome (3878558783).

The spelling of 2208320761 in words is "two billion, two hundred eight million, three hundred twenty thousand, seven hundred sixty-one".