2321320181 has 2 divisors, whose sum is σ = 2321320182. Its totient is φ = 2321320180.

The previous prime is 2321320163. The next prime is 2321320217. The reversal of 2321320181 is 1810231232.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2196796900 + 124523281 = 46870^2 + 11159^2 .

It is a cyclic number.

It is not a de Polignac number, because 2321320181 - 2¹⁴ = 2321303797 is a prime.

It is a super-2 number, since 2×2321320181² = 10777054765435745522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2321320081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1160660090 + 1160660091.

It is an arithmetic number, because the mean of its divisors is an integer number (1160660091).

Almost surely, 2^2321320181 is an apocalyptic number.

It is an amenable number.

2321320181 is a deficient number, since it is larger than the sum of its proper divisors (1).

2321320181 is an equidigital number, since it uses as much as digits as its factorization.

2321320181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 2321320181 is about 48180.0807492059. The cubic root of 2321320181 is about 1324.0722459535.

The spelling of 2321320181 in words is "two billion, three hundred twenty-one million, three hundred twenty thousand, one hundred eighty-one".