242533221 has 32 divisors (see below), whose sum is σ = 376040448. Its totient is φ = 136185600.

The previous prime is 242533189. The next prime is 242533253. The reversal of 242533221 is 122335242.

It is an interprime number because it is at equal distance from previous prime (242533189) and next prime (242533253).

It is not a de Polignac number, because 242533221 - 2⁵ = 242533189 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 242533191 and 242533200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242533021) 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, 604621 + ... + 605021.

It is an arithmetic number, because the mean of its divisors is an integer number (11751264).

Almost surely, 2^242533221 is an apocalyptic number.

242533221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

242533221 is a deficient number, since it is larger than the sum of its proper divisors (133507227).

242533221 is a wasteful number, since it uses less digits than its factorization.

242533221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 841.

The product of its digits is 2880, while the sum is 24.

The square root of 242533221 is about 15573.4781278942. The cubic root of 242533221 is about 623.6253272431.

Adding to 242533221 its reverse (122335242), we get a palindrome (364868463).

The spelling of 242533221 in words is "two hundred forty-two million, five hundred thirty-three thousand, two hundred twenty-one".