242422621 has 4 divisors (see below), whose sum is σ = 277054432. Its totient is φ = 207790812.

The previous prime is 242422619. The next prime is 242422637. The reversal of 242422621 is 126224242.

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 242422621 - 2¹ = 242422619 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242422021) 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, 17315895 + ... + 17315908.

It is an arithmetic number, because the mean of its divisors is an integer number (69263608).

Almost surely, 2^242422621 is an apocalyptic number.

It is an amenable number.

242422621 is a deficient number, since it is larger than the sum of its proper divisors (34631811).

242422621 is an equidigital number, since it uses as much as digits as its factorization.

242422621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34631810.

The product of its digits is 3072, while the sum is 25.

The square root of 242422621 is about 15569.9268142146. The cubic root of 242422621 is about 623.5305176222.

Adding to 242422621 its reverse (126224242), we get a palindrome (368646863).

The spelling of 242422621 in words is "two hundred forty-two million, four hundred twenty-two thousand, six hundred twenty-one".