143242021155 has 32 divisors (see below), whose sum is σ = 245204663040. Its totient is φ = 71188433280.

The previous prime is 143242021151. The next prime is 143242021157. The reversal of 143242021155 is 551120242341.

It is not a de Polignac number, because 143242021155 - 2² = 143242021151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (143242021151) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4102317 + ... + 4137086.

It is an arithmetic number, because the mean of its divisors is an integer number (7662645720).

Almost surely, 2^143242021155 is an apocalyptic number.

143242021155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

143242021155 is a deficient number, since it is larger than the sum of its proper divisors (101962641885).

143242021155 is a wasteful number, since it uses less digits than its factorization.

143242021155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8239491.

The product of its (nonzero) digits is 9600, while the sum is 30.

Adding to 143242021155 its reverse (551120242341), we get a palindrome (694362263496).

The spelling of 143242021155 in words is "one hundred forty-three billion, two hundred forty-two million, twenty-one thousand, one hundred fifty-five".