242161155 has 48 divisors (see below), whose sum is σ = 435936384. Its totient is φ = 124266240.

The previous prime is 242161133. The next prime is 242161159. The reversal of 242161155 is 551161242.

242161155 is a `hidden beast` number, since 2 + 42 + 1 + 611 + 5 + 5 = 666.

242161155 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 242161155 - 2⁷ = 242161027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (242161159) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 128077 + ... + 129953.

It is an arithmetic number, because the mean of its divisors is an integer number (9082008).

Almost surely, 2^242161155 is an apocalyptic number.

242161155 is a deficient number, since it is larger than the sum of its proper divisors (193775229).

242161155 is a wasteful number, since it uses less digits than its factorization.

242161155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1996 (or 1993 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 242161155 is about 15561.5280419373. The cubic root of 242161155 is about 623.3062664395.

The spelling of 242161155 in words is "two hundred forty-two million, one hundred sixty-one thousand, one hundred fifty-five".