242266221 has 10 divisors (see below), whose sum is σ = 361903982. Its totient is φ = 161510760.

The previous prime is 242266183. The next prime is 242266249. The reversal of 242266221 is 122662242.

It is a happy number.

242266221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 156500100 + 85766121 = 12510^2 + 9261^2 .

It is not a de Polignac number, because 242266221 - 2¹⁰ = 242265197 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242262221) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1495390 + ... + 1495551.

Almost surely, 2^242266221 is an apocalyptic number.

It is an amenable number.

242266221 is a deficient number, since it is larger than the sum of its proper divisors (119637761).

242266221 is an equidigital number, since it uses as much as digits as its factorization.

242266221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2990953 (or 2990944 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 242266221 is about 15564.9035011464. The cubic root of 242266221 is about 623.3963976407.

The spelling of 242266221 in words is "two hundred forty-two million, two hundred sixty-six thousand, two hundred twenty-one".