143740231 has 2 divisors, whose sum is σ = 143740232. Its totient is φ = 143740230.

The previous prime is 143740229. The next prime is 143740249. The reversal of 143740231 is 132047341.

It is a weak prime.

It is an emirp because it is prime and its reverse (132047341) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 143740231 - 2¹ = 143740229 is a prime.

It is a super-2 number, since 2×143740231² = 41322508015866722, which contains 22 as substring.

Together with 143740229, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 143740196 and 143740205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143743231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71870115 + 71870116.

It is an arithmetic number, because the mean of its divisors is an integer number (71870116).

Almost surely, 2^143740231 is an apocalyptic number.

143740231 is a deficient number, since it is larger than the sum of its proper divisors (1).

143740231 is an equidigital number, since it uses as much as digits as its factorization.

143740231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 143740231 is about 11989.1714058979. The cubic root of 143740231 is about 523.8329097903.

Adding to 143740231 its reverse (132047341), we get a palindrome (275787572).

The spelling of 143740231 in words is "one hundred forty-three million, seven hundred forty thousand, two hundred thirty-one".