242221266 has 40 divisors (see below), whose sum is σ = 620294400. Its totient is φ = 69205752.

The previous prime is 242221247. The next prime is 242221267. The reversal of 242221266 is 662122242.

It is a happy number.

It is a super-2 number, since 2×242221266² = 117342283405285512, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (242221267) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 105666 + ... + 107933.

It is an arithmetic number, because the mean of its divisors is an integer number (15507360).

Almost surely, 2^242221266 is an apocalyptic number.

242221266 is an abundant number, since it is smaller than the sum of its proper divisors (378073134).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

242221266 is a wasteful number, since it uses less digits than its factorization.

242221266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213620 (or 213611 counting only the distinct ones).

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

The square root of 242221266 is about 15563.4593198299. The cubic root of 242221266 is about 623.3578360416.

The spelling of 242221266 in words is "two hundred forty-two million, two hundred twenty-one thousand, two hundred sixty-six".