242734553 has 4 divisors (see below), whose sum is σ = 251104740. Its totient is φ = 234364368.

The previous prime is 242734493. The next prime is 242734589. The reversal of 242734553 is 355437242.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 355437242 = 2 ⋅177718621.

It can be written as a sum of positive squares in 2 ways, for example, as 54715609 + 188018944 = 7397^2 + 13712^2 .

It is a cyclic number.

It is not a de Polignac number, because 242734553 - 2¹⁰ = 242733529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242733553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4185050 + ... + 4185107.

It is an arithmetic number, because the mean of its divisors is an integer number (62776185).

Almost surely, 2^242734553 is an apocalyptic number.

It is an amenable number.

242734553 is a deficient number, since it is larger than the sum of its proper divisors (8370187).

242734553 is an equidigital number, since it uses as much as digits as its factorization.

242734553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8370186.

The product of its digits is 100800, while the sum is 35.

The square root of 242734553 is about 15579.9407251761. The cubic root of 242734553 is about 623.7978410781.

The spelling of 242734553 in words is "two hundred forty-two million, seven hundred thirty-four thousand, five hundred fifty-three".