2440023221 has 2 divisors, whose sum is σ = 2440023222. Its totient is φ = 2440023220.

The previous prime is 2440023211. The next prime is 2440023233. The reversal of 2440023221 is 1223200442.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1327800721 + 1112222500 = 36439^2 + 33350^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2440023221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2440023193 and 2440023202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2440023211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1220011610 + 1220011611.

It is an arithmetic number, because the mean of its divisors is an integer number (1220011611).

Almost surely, 2^2440023221 is an apocalyptic number.

It is an amenable number.

2440023221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2440023221 is an equidigital number, since it uses as much as digits as its factorization.

2440023221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 2440023221 is about 49396.5911880567. The cubic root of 2440023221 is about 1346.2673701465.

Adding to 2440023221 its reverse (1223200442), we get a palindrome (3663223663).

The spelling of 2440023221 in words is "two billion, four hundred forty million, twenty-three thousand, two hundred twenty-one".