143135231 has 4 divisors (see below), whose sum is σ = 143209752. Its totient is φ = 143060712.

The previous prime is 143135221. The next prime is 143135263. The reversal of 143135231 is 132531341.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 143135231 - 2²² = 138940927 is a prime.

It is a super-2 number, since 2×143135231² = 40975388706846722, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 143135197 and 143135206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143135221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34301 + ... + 38246.

It is an arithmetic number, because the mean of its divisors is an integer number (35802438).

Almost surely, 2^143135231 is an apocalyptic number.

143135231 is a deficient number, since it is larger than the sum of its proper divisors (74521).

143135231 is an equidigital number, since it uses as much as digits as its factorization.

143135231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74520.

The product of its digits is 1080, while the sum is 23.

The square root of 143135231 is about 11963.9136991204. The cubic root of 143135231 is about 523.0969418892.

Adding to 143135231 its reverse (132531341), we get a palindrome (275666572).

The spelling of 143135231 in words is "one hundred forty-three million, one hundred thirty-five thousand, two hundred thirty-one".