242233021 has 4 divisors (see below), whose sum is σ = 242404672. Its totient is φ = 242061372.

The previous prime is 242233009. The next prime is 242233067. The reversal of 242233021 is 120332242.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 242233021 - 2¹¹ = 242230973 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 242233021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242233421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83691 + ... + 86536.

It is an arithmetic number, because the mean of its divisors is an integer number (60601168).

Almost surely, 2^242233021 is an apocalyptic number.

It is an amenable number.

242233021 is a deficient number, since it is larger than the sum of its proper divisors (171651).

242233021 is a wasteful number, since it uses less digits than its factorization.

242233021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171650.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 242233021 is about 15563.8369626516. The cubic root of 242233021 is about 623.3679197321.

Adding to 242233021 its reverse (120332242), we get a palindrome (362565263).

The spelling of 242233021 in words is "two hundred forty-two million, two hundred thirty-three thousand, twenty-one".