2382207721 has 2 divisors, whose sum is σ = 2382207722. Its totient is φ = 2382207720.

The previous prime is 2382207719. The next prime is 2382207733. The reversal of 2382207721 is 1277022832.

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., 1327582096 + 1054625625 = 36436^2 + 32475^2 .

It is a cyclic number.

It is not a de Polignac number, because 2382207721 - 2¹ = 2382207719 is a prime.

Together with 2382207719, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2382207701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1191103860 + 1191103861.

It is an arithmetic number, because the mean of its divisors is an integer number (1191103861).

Almost surely, 2^2382207721 is an apocalyptic number.

It is an amenable number.

2382207721 is a deficient number, since it is larger than the sum of its proper divisors (1).

2382207721 is an equidigital number, since it uses as much as digits as its factorization.

2382207721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18816, while the sum is 34.

The square root of 2382207721 is about 48807.8653600011. The cubic root of 2382207721 is about 1335.5491521468.

The spelling of 2382207721 in words is "two billion, three hundred eighty-two million, two hundred seven thousand, seven hundred twenty-one".