242553117 has 4 divisors (see below), whose sum is σ = 323404160. Its totient is φ = 161702076.

The previous prime is 242553079. The next prime is 242553121. The reversal of 242553117 is 711355242.

242553117 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 242553117 - 2⁶ = 242553053 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 (242053117) 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, 40425517 + ... + 40425522.

It is an arithmetic number, because the mean of its divisors is an integer number (80851040).

Almost surely, 2^242553117 is an apocalyptic number.

It is an amenable number.

242553117 is a deficient number, since it is larger than the sum of its proper divisors (80851043).

242553117 is an equidigital number, since it uses as much as digits as its factorization.

242553117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80851042.

The product of its digits is 8400, while the sum is 30.

The square root of 242553117 is about 15574.1168931018. The cubic root of 242553117 is about 623.6423796290.

It can be divided in two parts, 24255 and 3117, that added together give a palindrome (27372).

The spelling of 242553117 in words is "two hundred forty-two million, five hundred fifty-three thousand, one hundred seventeen".