242654221 has 2 divisors, whose sum is σ = 242654222. Its totient is φ = 242654220.

The previous prime is 242654119. The next prime is 242654227. The reversal of 242654221 is 122456242.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 188101225 + 54552996 = 13715^2 + 7386^2 .

It is a cyclic number.

It is not a de Polignac number, because 242654221 - 2²³ = 234265613 is a prime.

It is equal to p_13299004 and since 242654221 and 13299004 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 242654221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242654227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121327110 + 121327111.

It is an arithmetic number, because the mean of its divisors is an integer number (121327111).

Almost surely, 2^242654221 is an apocalyptic number.

It is an amenable number.

242654221 is a deficient number, since it is larger than the sum of its proper divisors (1).

242654221 is an equidigital number, since it uses as much as digits as its factorization.

242654221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7680, while the sum is 28.

The square root of 242654221 is about 15577.3624532525. The cubic root of 242654221 is about 623.7290190439.

The spelling of 242654221 in words is "two hundred forty-two million, six hundred fifty-four thousand, two hundred twenty-one".