240740221 has 8 divisors (see below), whose sum is σ = 245296800. Its totient is φ = 236203440.

The previous prime is 240740219. The next prime is 240740231. The reversal of 240740221 is 122047042.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 240740221 - 2¹ = 240740219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 240740192 and 240740201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240740231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20850 + ... + 30268.

It is an arithmetic number, because the mean of its divisors is an integer number (30662100).

Almost surely, 2^240740221 is an apocalyptic number.

It is an amenable number.

240740221 is a deficient number, since it is larger than the sum of its proper divisors (4556579).

240740221 is an equidigital number, since it uses as much as digits as its factorization.

240740221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9899.

The product of its (nonzero) digits is 896, while the sum is 22.

The square root of 240740221 is about 15515.8055221120. The cubic root of 240740221 is about 622.0847451245.

Adding to 240740221 its reverse (122047042), we get a palindrome (362787263).

The spelling of 240740221 in words is "two hundred forty million, seven hundred forty thousand, two hundred twenty-one".