2321320081 has 2 divisors, whose sum is σ = 2321320082. Its totient is φ = 2321320080.

The previous prime is 2321320073. The next prime is 2321320091. The reversal of 2321320081 is 1800231232.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1196053056 + 1125267025 = 34584^2 + 33545^2 .

It is a cyclic number.

It is not a de Polignac number, because 2321320081 - 2³ = 2321320073 is a prime.

It is a super-2 number, since 2×2321320081² = 10777053836907693122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2321320091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1160660040 + 1160660041.

It is an arithmetic number, because the mean of its divisors is an integer number (1160660041).

Almost surely, 2^2321320081 is an apocalyptic number.

It is an amenable number.

2321320081 is a deficient number, since it is larger than the sum of its proper divisors (1).

2321320081 is an equidigital number, since it uses as much as digits as its factorization.

2321320081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 2321320081 is about 48180.0797114326. The cubic root of 2321320081 is about 1324.0722269403.

The spelling of 2321320081 in words is "two billion, three hundred twenty-one million, three hundred twenty thousand, eighty-one".