242420553 has 8 divisors (see below), whose sum is σ = 359141600. Its totient is φ = 161613684.

The previous prime is 242420551. The next prime is 242420567. The reversal of 242420553 is 355024242.

It is a happy number.

242420553 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 242420553 - 2¹ = 242420551 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 8978539 = 242420553 / (2 + 4 + 2 + 4 + 2 + 0 + 5 + 5 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242420551) 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, 4489243 + ... + 4489296.

It is an arithmetic number, because the mean of its divisors is an integer number (44892700).

Almost surely, 2^242420553 is an apocalyptic number.

It is an amenable number.

242420553 is a deficient number, since it is larger than the sum of its proper divisors (116721047).

242420553 is an equidigital number, since it uses as much as digits as its factorization.

242420553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8978548 (or 8978542 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 27.

The square root of 242420553 is about 15569.8604039985. The cubic root of 242420553 is about 623.5287445963.

Adding to 242420553 its reverse (355024242), we get a palindrome (597444795).

The spelling of 242420553 in words is "two hundred forty-two million, four hundred twenty thousand, five hundred fifty-three".