242533021 has 2 divisors, whose sum is σ = 242533022. Its totient is φ = 242533020.

The previous prime is 242532991. The next prime is 242533037. The reversal of 242533021 is 120335242.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 228432996 + 14100025 = 15114^2 + 3755^2 .

It is a cyclic number.

It is not a de Polignac number, because 242533021 - 2⁹ = 242532509 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 242532983 and 242533001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242530021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121266510 + 121266511.

It is an arithmetic number, because the mean of its divisors is an integer number (121266511).

Almost surely, 2^242533021 is an apocalyptic number.

It is an amenable number.

242533021 is a deficient number, since it is larger than the sum of its proper divisors (1).

242533021 is an equidigital number, since it uses as much as digits as its factorization.

242533021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 242533021 is about 15573.4717067197. The cubic root of 242533021 is about 623.6251558232.

Adding to 242533021 its reverse (120335242), we get a palindrome (362868263).

The spelling of 242533021 in words is "two hundred forty-two million, five hundred thirty-three thousand, twenty-one".