242320221 has 32 divisors (see below), whose sum is σ = 421760640. Its totient is φ = 135561600.

The previous prime is 242320219. The next prime is 242320279. The reversal of 242320221 is 122023242.

242320221 is a `hidden beast` number, since 2 + 423 + 20 + 221 = 666.

It is not a de Polignac number, because 242320221 - 2¹ = 242320219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 242320194 and 242320203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242320321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27520 + ... + 35241.

It is an arithmetic number, because the mean of its divisors is an integer number (13180020).

Almost surely, 2^242320221 is an apocalyptic number.

It is an amenable number.

242320221 is a deficient number, since it is larger than the sum of its proper divisors (179440419).

242320221 is a wasteful number, since it uses less digits than its factorization.

242320221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62794 (or 62788 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 242320221 is about 15566.6380763478. The cubic root of 242320221 is about 623.4427115738.

Adding to 242320221 its reverse (122023242), we get a palindrome (364343463).

The spelling of 242320221 in words is "two hundred forty-two million, three hundred twenty thousand, two hundred twenty-one".