242101555 has 4 divisors (see below), whose sum is σ = 290521872. Its totient is φ = 193681240.

The previous prime is 242101549. The next prime is 242101579. The reversal of 242101555 is 555101242.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 242101555 - 2³ = 242101547 is a prime.

It is a super-2 number, since 2×242101555² = 117226325866836050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24210151 + ... + 24210160.

It is an arithmetic number, because the mean of its divisors is an integer number (72630468).

Almost surely, 2^242101555 is an apocalyptic number.

242101555 is a deficient number, since it is larger than the sum of its proper divisors (48420317).

242101555 is an equidigital number, since it uses as much as digits as its factorization.

242101555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48420316.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 242101555 is about 15559.6129450575. The cubic root of 242101555 is about 623.2551268013.

Adding to 242101555 its reverse (555101242), we get a palindrome (797202797).

The spelling of 242101555 in words is "two hundred forty-two million, one hundred one thousand, five hundred fifty-five".