240327721 has 4 divisors (see below), whose sum is σ = 240927444. Its totient is φ = 239728000.

The previous prime is 240327719. The next prime is 240327733. The reversal of 240327721 is 127723042.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 229674025 + 10653696 = 15155^2 + 3264^2 .

It is a cyclic number.

It is not a de Polignac number, because 240327721 - 2¹ = 240327719 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 240327721.

It is not an unprimeable number, because it can be changed into a prime (240327421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 299260 + ... + 300061.

It is an arithmetic number, because the mean of its divisors is an integer number (60231861).

Almost surely, 2^240327721 is an apocalyptic number.

It is an amenable number.

240327721 is a deficient number, since it is larger than the sum of its proper divisors (599723).

240327721 is an equidigital number, since it uses as much as digits as its factorization.

240327721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599722.

The product of its (nonzero) digits is 4704, while the sum is 28.

The square root of 240327721 is about 15502.5069263007. The cubic root of 240327721 is about 621.7292351339.

The spelling of 240327721 in words is "two hundred forty million, three hundred twenty-seven thousand, seven hundred twenty-one".