240663221 has 4 divisors (see below), whose sum is σ = 240694272. Its totient is φ = 240632172.

The previous prime is 240663197. The next prime is 240663229. The reversal of 240663221 is 122366042.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 240663221 - 2²² = 236468917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240663229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6860 + ... + 22986.

It is an arithmetic number, because the mean of its divisors is an integer number (60173568).

Almost surely, 2^240663221 is an apocalyptic number.

It is an amenable number.

240663221 is a deficient number, since it is larger than the sum of its proper divisors (31051).

240663221 is a wasteful number, since it uses less digits than its factorization.

240663221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31050.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 240663221 is about 15513.3239829509. The cubic root of 240663221 is about 622.0184141045.

The spelling of 240663221 in words is "two hundred forty million, six hundred sixty-three thousand, two hundred twenty-one".