240440213 has 16 divisors (see below), whose sum is σ = 264875520. Its totient is φ = 216912384.

The previous prime is 240440209. The next prime is 240440227. The reversal of 240440213 is 312044042.

It is not a de Polignac number, because 240440213 - 2² = 240440209 is a prime.

It is a super-2 number, since 2×240440213² = 115622992054970738, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240440243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104645 + ... + 106917.

It is an arithmetic number, because the mean of its divisors is an integer number (16554720).

Almost surely, 2^240440213 is an apocalyptic number.

It is an amenable number.

240440213 is a deficient number, since it is larger than the sum of its proper divisors (24435307).

240440213 is a wasteful number, since it uses less digits than its factorization.

240440213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2468.

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

The square root of 240440213 is about 15506.1346892125. The cubic root of 240440213 is about 621.8262258255.

Adding to 240440213 its reverse (312044042), we get a palindrome (552484255).

The spelling of 240440213 in words is "two hundred forty million, four hundred forty thousand, two hundred thirteen".