242143155 has 32 divisors (see below), whose sum is σ = 455803200. Its totient is φ = 121545216.

The previous prime is 242143123. The next prime is 242143199. The reversal of 242143155 is 551341242.

It is not a de Polignac number, because 242143155 - 2⁵ = 242143123 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 50460 + ... + 55049.

It is an arithmetic number, because the mean of its divisors is an integer number (14243850).

Almost surely, 2^242143155 is an apocalyptic number.

242143155 is a deficient number, since it is larger than the sum of its proper divisors (213660045).

242143155 is a wasteful number, since it uses less digits than its factorization.

242143155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105540 (or 105534 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 242143155 is about 15560.9496818157. The cubic root of 242143155 is about 623.2908224668.

Adding to 242143155 its reverse (551341242), we get a palindrome (793484397).

The spelling of 242143155 in words is "two hundred forty-two million, one hundred forty-three thousand, one hundred fifty-five".