143242023137 has 4 divisors (see below), whose sum is σ = 151668024516. Its totient is φ = 134816021760.

The previous prime is 143242023079. The next prime is 143242023157. The reversal of 143242023137 is 731320242341.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 731320242341 = 13 ⋅56255403257.

It can be written as a sum of positive squares in 2 ways, for example, as 60088226641 + 83153796496 = 245129^2 + 288364^2 .

It is a cyclic number.

It is not a de Polignac number, because 143242023137 - 2¹⁶ = 143241957601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (143242023157) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4213000664 + ... + 4213000697.

It is an arithmetic number, because the mean of its divisors is an integer number (37917006129).

Almost surely, 2^143242023137 is an apocalyptic number.

143242023137 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

143242023137 is a deficient number, since it is larger than the sum of its proper divisors (8426001379).

143242023137 is an equidigital number, since it uses as much as digits as its factorization.

143242023137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8426001378.

The product of its (nonzero) digits is 24192, while the sum is 32.

Adding to 143242023137 its reverse (731320242341), we get a palindrome (874562265478).

The spelling of 143242023137 in words is "one hundred forty-three billion, two hundred forty-two million, twenty-three thousand, one hundred thirty-seven".