242221066 has 16 divisors (see below), whose sum is σ = 385615944. Its totient is φ = 113716224.

The previous prime is 242221061. The next prime is 242221099. The reversal of 242221066 is 660122242.

It can be written as a sum of positive squares in 4 ways, for example, as 231192025 + 11029041 = 15205^2 + 3321^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 242221066.

It is not an unprimeable number, because it can be changed into a prime (242221061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6496 + ... + 22948.

Almost surely, 2^242221066 is an apocalyptic number.

242221066 is a deficient number, since it is larger than the sum of its proper divisors (143394878).

242221066 is a wasteful number, since it uses less digits than its factorization.

242221066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16905.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 242221066 is about 15563.4528945218. The cubic root of 242221066 is about 623.3576644745.

The spelling of 242221066 in words is "two hundred forty-two million, two hundred twenty-one thousand, sixty-six".