240440313 has 4 divisors (see below), whose sum is σ = 320587088. Its totient is φ = 160293540.

The previous prime is 240440311. The next prime is 240440323. The reversal of 240440313 is 313044042.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 240440313 - 2¹ = 240440311 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 240440313.

It is not an unprimeable number, because it can be changed into a prime (240440311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40073383 + ... + 40073388.

It is an arithmetic number, because the mean of its divisors is an integer number (80146772).

Almost surely, 2^240440313 is an apocalyptic number.

It is an amenable number.

240440313 is a deficient number, since it is larger than the sum of its proper divisors (80146775).

240440313 is an equidigital number, since it uses as much as digits as its factorization.

240440313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80146774.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 240440313 is about 15506.1379137424. The cubic root of 240440313 is about 621.8263120321.

Adding to 240440313 its reverse (313044042), we get a palindrome (553484355).

The spelling of 240440313 in words is "two hundred forty million, four hundred forty thousand, three hundred thirteen".