242153555 has 32 divisors (see below), whose sum is σ = 349360128. Its totient is φ = 157622400.

The previous prime is 242153551. The next prime is 242153563. The reversal of 242153555 is 555351242.

It is not a de Polignac number, because 242153555 - 2² = 242153551 is a prime.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242153551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55400 + ... + 59610.

It is an arithmetic number, because the mean of its divisors is an integer number (10917504).

Almost surely, 2^242153555 is an apocalyptic number.

242153555 is a deficient number, since it is larger than the sum of its proper divisors (107206573).

242153555 is a wasteful number, since it uses less digits than its factorization.

242153555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4307.

The product of its digits is 30000, while the sum is 32.

The square root of 242153555 is about 15561.2838480634. The cubic root of 242153555 is about 623.2997457444.

The spelling of 242153555 in words is "two hundred forty-two million, one hundred fifty-three thousand, five hundred fifty-five".